Vulnerability-Lookup

BDU:2026-11520 (CVE-2026-20349)

Vulnerability from fstec – Published: 2026-08-13 – Updated: 2026-08-14 – View on bdu.fstec.ru Exploit exists Yes Fixed

Title

Summary

Уязвимость сервера удаленного доступа Remote Access SSL VPN микропрограммного обеспечения межсетевых экранов Cisco Adaptive Security Appliance (ASA) и Cisco Secure Firewall Threat Defense (FTD) связана с неправильной очисткой динамической памяти. Эксплуатация уязвимости позволяет нарушителю, действующему удаленно, вызвать отказ в обслуживании

Severity

7.8 (High) CVSS 2.0


                      
                        AV:N/AC:L/Au:N/C:N/I:N/A:C

8.6 (High) CVSS 3.1


                      
                        CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Data structure manipulation

Incidents

Yes

Remediation

Software update

CWE

CWE-244 - Неправильная очистка кучи перед ее освобождением

Aliases

CVE-2026-20349

References

5 references

URL
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/c…
https://www.cisa.gov/news-events/alerts/2026/08/11/cisa-adds-three-known-exploi…
https://www.cybersecuritydive.com/news/cisco-firewall-vulnerabilities-vpn-crash…
https://socprime.com/blog/cve-2026-20349-actively-exploited-cisco-asa-and-ftd-f…
https://www.cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv

Impacted products

2 products from 2 vendors

Vendors

Cisco Systems, Inc.

Products

Adaptive Security Appliance, Cisco Secure Firewall Threat Defense (FTD)

Versions

9.16.1 (Adaptive Security Appliance), 9.16.3 (Adaptive Security Appliance), 9.16.3.3 (Adaptive Security Appliance), 9.16.3.14 (Adaptive Security Appliance), 9.18.1 (Adaptive Security Appliance), 9.16.1.28 (Adaptive Security Appliance), 9.16.2 (Adaptive Security Appliance), 9.16.2.3 (Adaptive Security Appliance), 9.16.2.7 (Adaptive Security Appliance), 9.16.2.11 (Adaptive Security Appliance), 9.16.2.13 (Adaptive Security Appliance), 9.16.2.14 (Adaptive Security Appliance), 9.16.3.15 (Adaptive Security Appliance), 9.16.3.19 (Adaptive Security Appliance), 9.16.3.23 (Adaptive Security Appliance), 9.16.4 (Adaptive Security Appliance), 9.16.4.9 (Adaptive Security Appliance), 9.18.1.3 (Adaptive Security Appliance), 9.18.2 (Adaptive Security Appliance), 9.18.2.5 (Adaptive Security Appliance), 9.18.2.7 (Adaptive Security Appliance), 9.19.1 (Adaptive Security Appliance), 9.16.4.14 (Adaptive Security Appliance), 9.16.4.18 (Adaptive Security Appliance), 9.18.2.8 (Adaptive Security Appliance), 9.18.3 (Adaptive Security Appliance), 9.19.1.5 (Adaptive Security Appliance), 9.19.1.9 (Adaptive Security Appliance), 9.16.4.19 (Adaptive Security Appliance), 9.16.4.27 (Adaptive Security Appliance), 9.18.3.39 (Adaptive Security Appliance), 9.18.3.46 (Adaptive Security Appliance), 9.19.1.12 (Adaptive Security Appliance), 9.16.4.38 (Adaptive Security Appliance), 9.18.3.53 (Adaptive Security Appliance), 9.18.3.55 (Adaptive Security Appliance), 9.19.1.18 (Adaptive Security Appliance), 9.16.4.39 (Adaptive Security Appliance), 9.16.4.42 (Adaptive Security Appliance), 9.16.4.48 (Adaptive Security Appliance), 9.16.4.55 (Adaptive Security Appliance), 9.18.3.56 (Adaptive Security Appliance), 9.18.4 (Adaptive Security Appliance), 9.18.4.5 (Adaptive Security Appliance), 9.18.4.8 (Adaptive Security Appliance), 9.19.1.22 (Adaptive Security Appliance), 9.19.1.24 (Adaptive Security Appliance), 9.19.1.27 (Adaptive Security Appliance), 9.20.1 (Adaptive Security Appliance), 9.20.1.5 (Adaptive Security Appliance), 9.20.2 (Adaptive Security Appliance), 9.16.4.57 (Adaptive Security Appliance), 9.16.4.61 (Adaptive Security Appliance), 9.18.4.22 (Adaptive Security Appliance), 9.18.4.24 (Adaptive Security Appliance), 9.18.4.29 (Adaptive Security Appliance), 9.19.1.28 (Adaptive Security Appliance), 9.19.1.31 (Adaptive Security Appliance), 9.20.2.10 (Adaptive Security Appliance), 9.20.2.21 (Adaptive Security Appliance), 9.20.2.22 (Adaptive Security Appliance), 9.16.4.67 (Adaptive Security Appliance), 9.16.4.70 (Adaptive Security Appliance), 9.18.4.40 (Adaptive Security Appliance), 9.20.3 (Adaptive Security Appliance), 9.16.4.62 (Adaptive Security Appliance), 9.18.4.34 (Adaptive Security Appliance), 9.20.3.4 (Adaptive Security Appliance), 9.20.3.7 (Adaptive Security Appliance), 9.22.1.1 (Adaptive Security Appliance), 9.16.4.71 (Adaptive Security Appliance), 9.16.4.76 (Adaptive Security Appliance), 9.16.4.82 (Adaptive Security Appliance), 9.18.4.47 (Adaptive Security Appliance), 9.18.4.50 (Adaptive Security Appliance), 9.18.4.52 (Adaptive Security Appliance), 9.18.4.53 (Adaptive Security Appliance), 9.19.1.37 (Adaptive Security Appliance), 9.19.1.38 (Adaptive Security Appliance), 9.20.3.9 (Adaptive Security Appliance), 9.20.3.10 (Adaptive Security Appliance), 9.20.3.13 (Adaptive Security Appliance), 9.22.1.3 (Adaptive Security Appliance), 9.22.1.2 (Adaptive Security Appliance), 9.22.1.6 (Adaptive Security Appliance), 9.23.1 (Adaptive Security Appliance), 9.16.4.84 (Adaptive Security Appliance), 9.18.4.57 (Adaptive Security Appliance), 9.18.4.66 (Adaptive Security Appliance), 9.19.1.42 (Adaptive Security Appliance), 9.20.3.16 (Adaptive Security Appliance), 9.20.3.20 (Adaptive Security Appliance), 9.20.4 (Adaptive Security Appliance), 9.20.4.7 (Adaptive Security Appliance), 9.22.2 (Adaptive Security Appliance), 9.22.2.4 (Adaptive Security Appliance), 9.22.2.9 (Adaptive Security Appliance), 9.22.2.13 (Adaptive Security Appliance), 9.23.1.3 (Adaptive Security Appliance), 9.23.1.7 (Adaptive Security Appliance), 9.23.1.13 (Adaptive Security Appliance), 7.0.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.0.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.1.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.2.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.4 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.5 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.6 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.6.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.6.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.6.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.7 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.8 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.8.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.0.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.4 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.4.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.5 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.5.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.6 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.7 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.5.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.8 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.8.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.9 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.10 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.10.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.3.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.3.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.3.1.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.3.1.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.1.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.2.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.2.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.2.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.2.4 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.6.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.6.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.6.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.6.2.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.7.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.7.10 (Cisco Secure Firewall Threat Defense (FTD)), 7.7.10.1 (Cisco Secure Firewall Threat Defense (FTD)), 9.18.4.67 (Adaptive Security Appliance), 9.18.4.68 (Adaptive Security Appliance), 9.16 (Adaptive Security Appliance), 9.16.4.85 (Adaptive Security Appliance), 9.16.4.89 (Adaptive Security Appliance), 9.16.4.92 (Adaptive Security Appliance), 9.18 (Adaptive Security Appliance), 9.18.4.71 (Adaptive Security Appliance), 9.18.4.76 (Adaptive Security Appliance), 9.18.4.135 (Adaptive Security Appliance), 9.18.4.82 (Adaptive Security Appliance), 9.18.4.90 (Adaptive Security Appliance), 9.19 (Adaptive Security Appliance), 9.20 (Adaptive Security Appliance), 9.20.4.10 (Adaptive Security Appliance), 9.20.4.14 (Adaptive Security Appliance), 9.20.4.19 (Adaptive Security Appliance), 9.20.4.22 (Adaptive Security Appliance), 9.20.4.28 (Adaptive Security Appliance), 9.20.4.30 (Adaptive Security Appliance), 9.20.4.34 (Adaptive Security Appliance), 9.20.4.46 (Adaptive Security Appliance), 9.22 (Adaptive Security Appliance), 9.22.2.14 (Adaptive Security Appliance), 9.22.2.20 (Adaptive Security Appliance), 9.22.2.32 (Adaptive Security Appliance), 9.22.3 (Adaptive Security Appliance), 9.22.3.5 (Adaptive Security Appliance), 9.23 (Adaptive Security Appliance), 9.23.1.19 (Adaptive Security Appliance), 9.23.1.22 (Adaptive Security Appliance), 9.23.1.26 (Adaptive Security Appliance), 9.23.1.195 (Adaptive Security Appliance), 9.23.1.32 (Adaptive Security Appliance), 9.24 (Adaptive Security Appliance), 9.24.1 (Adaptive Security Appliance), 9.24.1.5 (Adaptive Security Appliance), 9.24.1.9 (Adaptive Security Appliance), 9.24.1.155 (Adaptive Security Appliance), 9.24.1.11 (Adaptive Security Appliance), 7.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.9 (Cisco Secure Firewall Threat Defense (FTD)), 7.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.11 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.12 (Cisco Secure Firewall Threat Defense (FTD)), 7.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.4 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.4 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.7 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.8 (Cisco Secure Firewall Threat Defense (FTD)), 7.6 (Cisco Secure Firewall Threat Defense (FTD)), 7.6.4 (Cisco Secure Firewall Threat Defense (FTD)), 7.7 (Cisco Secure Firewall Threat Defense (FTD)), 7.7.11 (Cisco Secure Firewall Threat Defense (FTD)), 7.7.13 (Cisco Secure Firewall Threat Defense (FTD)), 10.0 (Cisco Secure Firewall Threat Defense (FTD)), 10.0.0 (Cisco Secure Firewall Threat Defense (FTD)), 10.0.2 (Cisco Secure Firewall Threat Defense (FTD))

Product types

Network appliance software, Security device

Mitigations

Использование рекомендаций производителя: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-vpn-dos-dzv4mQFF

JSON

To clipboard

{
  "CVSS 2.0": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
  "CVSS 3.0": "AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
  "CVSS 4.0": null,
  "remediation_\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": null,
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": null,
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "Cisco Systems, Inc.",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "9.16.1 (Adaptive Security Appliance), 9.16.3 (Adaptive Security Appliance), 9.16.3.3 (Adaptive Security Appliance), 9.16.3.14 (Adaptive Security Appliance), 9.18.1 (Adaptive Security Appliance), 9.16.1.28 (Adaptive Security Appliance), 9.16.2 (Adaptive Security Appliance), 9.16.2.3 (Adaptive Security Appliance), 9.16.2.7 (Adaptive Security Appliance), 9.16.2.11 (Adaptive Security Appliance), 9.16.2.13 (Adaptive Security Appliance), 9.16.2.14 (Adaptive Security Appliance), 9.16.3.15 (Adaptive Security Appliance), 9.16.3.19 (Adaptive Security Appliance), 9.16.3.23 (Adaptive Security Appliance), 9.16.4 (Adaptive Security Appliance), 9.16.4.9 (Adaptive Security Appliance), 9.18.1.3 (Adaptive Security Appliance), 9.18.2 (Adaptive Security Appliance), 9.18.2.5 (Adaptive Security Appliance), 9.18.2.7 (Adaptive Security Appliance), 9.19.1 (Adaptive Security Appliance), 9.16.4.14 (Adaptive Security Appliance), 9.16.4.18 (Adaptive Security Appliance), 9.18.2.8 (Adaptive Security Appliance), 9.18.3 (Adaptive Security Appliance), 9.19.1.5 (Adaptive Security Appliance), 9.19.1.9 (Adaptive Security Appliance), 9.16.4.19 (Adaptive Security Appliance), 9.16.4.27 (Adaptive Security Appliance), 9.18.3.39 (Adaptive Security Appliance), 9.18.3.46 (Adaptive Security Appliance), 9.19.1.12 (Adaptive Security Appliance), 9.16.4.38 (Adaptive Security Appliance), 9.18.3.53 (Adaptive Security Appliance), 9.18.3.55 (Adaptive Security Appliance), 9.19.1.18 (Adaptive Security Appliance), 9.16.4.39 (Adaptive Security Appliance), 9.16.4.42 (Adaptive Security Appliance), 9.16.4.48 (Adaptive Security Appliance), 9.16.4.55 (Adaptive Security Appliance), 9.18.3.56 (Adaptive Security Appliance), 9.18.4 (Adaptive Security Appliance), 9.18.4.5 (Adaptive Security Appliance), 9.18.4.8 (Adaptive Security Appliance), 9.19.1.22 (Adaptive Security Appliance), 9.19.1.24 (Adaptive Security Appliance), 9.19.1.27 (Adaptive Security Appliance), 9.20.1 (Adaptive Security Appliance), 9.20.1.5 (Adaptive Security Appliance), 9.20.2 (Adaptive Security Appliance), 9.16.4.57 (Adaptive Security Appliance), 9.16.4.61 (Adaptive Security Appliance), 9.18.4.22 (Adaptive Security Appliance), 9.18.4.24 (Adaptive Security Appliance), 9.18.4.29 (Adaptive Security Appliance), 9.19.1.28 (Adaptive Security Appliance), 9.19.1.31 (Adaptive Security Appliance), 9.20.2.10 (Adaptive Security Appliance), 9.20.2.21 (Adaptive Security Appliance), 9.20.2.22 (Adaptive Security Appliance), 9.16.4.67 (Adaptive Security Appliance), 9.16.4.70 (Adaptive Security Appliance), 9.18.4.40 (Adaptive Security Appliance), 9.20.3 (Adaptive Security Appliance), 9.16.4.62 (Adaptive Security Appliance), 9.18.4.34 (Adaptive Security Appliance), 9.20.3.4 (Adaptive Security Appliance), 9.20.3.7 (Adaptive Security Appliance), 9.22.1.1 (Adaptive Security Appliance), 9.16.4.71 (Adaptive Security Appliance), 9.16.4.76 (Adaptive Security Appliance), 9.16.4.82 (Adaptive Security Appliance), 9.18.4.47 (Adaptive Security Appliance), 9.18.4.50 (Adaptive Security Appliance), 9.18.4.52 (Adaptive Security Appliance), 9.18.4.53 (Adaptive Security Appliance), 9.19.1.37 (Adaptive Security Appliance), 9.19.1.38 (Adaptive Security Appliance), 9.20.3.9 (Adaptive Security Appliance), 9.20.3.10 (Adaptive Security Appliance), 9.20.3.13 (Adaptive Security Appliance), 9.22.1.3 (Adaptive Security Appliance), 9.22.1.2 (Adaptive Security Appliance), 9.22.1.6 (Adaptive Security Appliance), 9.23.1 (Adaptive Security Appliance), 9.16.4.84 (Adaptive Security Appliance), 9.18.4.57 (Adaptive Security Appliance), 9.18.4.66 (Adaptive Security Appliance), 9.19.1.42 (Adaptive Security Appliance), 9.20.3.16 (Adaptive Security Appliance), 9.20.3.20 (Adaptive Security Appliance), 9.20.4 (Adaptive Security Appliance), 9.20.4.7 (Adaptive Security Appliance), 9.22.2 (Adaptive Security Appliance), 9.22.2.4 (Adaptive Security Appliance), 9.22.2.9 (Adaptive Security Appliance), 9.22.2.13 (Adaptive Security Appliance), 9.23.1.3 (Adaptive Security Appliance), 9.23.1.7 (Adaptive Security Appliance), 9.23.1.13 (Adaptive Security Appliance), 7.0.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.0.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.1.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.2.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.4 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.5 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.6 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.6.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.6.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.6.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.7 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.8 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.8.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.0.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.4 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.4.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.5 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.5.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.6 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.7 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.5.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.8 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.8.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.9 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.10 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.10.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.3.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.3.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.3.1.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.3.1.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.1.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.2.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.2.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.2.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.2.4 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.6.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.6.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.6.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.6.2.1 (Cisco Secure Firewall Threat Defense (FTD)), 7.7.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.7.10 (Cisco Secure Firewall Threat Defense (FTD)), 7.7.10.1 (Cisco Secure Firewall Threat Defense (FTD)), 9.18.4.67 (Adaptive Security Appliance), 9.18.4.68 (Adaptive Security Appliance), 9.16 (Adaptive Security Appliance), 9.16.4.85 (Adaptive Security Appliance), 9.16.4.89 (Adaptive Security Appliance), 9.16.4.92 (Adaptive Security Appliance), 9.18 (Adaptive Security Appliance), 9.18.4.71 (Adaptive Security Appliance), 9.18.4.76 (Adaptive Security Appliance), 9.18.4.135 (Adaptive Security Appliance), 9.18.4.82 (Adaptive Security Appliance), 9.18.4.90 (Adaptive Security Appliance), 9.19 (Adaptive Security Appliance), 9.20 (Adaptive Security Appliance), 9.20.4.10 (Adaptive Security Appliance), 9.20.4.14 (Adaptive Security Appliance), 9.20.4.19 (Adaptive Security Appliance), 9.20.4.22 (Adaptive Security Appliance), 9.20.4.28 (Adaptive Security Appliance), 9.20.4.30 (Adaptive Security Appliance), 9.20.4.34 (Adaptive Security Appliance), 9.20.4.46 (Adaptive Security Appliance), 9.22 (Adaptive Security Appliance), 9.22.2.14 (Adaptive Security Appliance), 9.22.2.20 (Adaptive Security Appliance), 9.22.2.32 (Adaptive Security Appliance), 9.22.3 (Adaptive Security Appliance), 9.22.3.5 (Adaptive Security Appliance), 9.23 (Adaptive Security Appliance), 9.23.1.19 (Adaptive Security Appliance), 9.23.1.22 (Adaptive Security Appliance), 9.23.1.26 (Adaptive Security Appliance), 9.23.1.195 (Adaptive Security Appliance), 9.23.1.32 (Adaptive Security Appliance), 9.24 (Adaptive Security Appliance), 9.24.1 (Adaptive Security Appliance), 9.24.1.5 (Adaptive Security Appliance), 9.24.1.9 (Adaptive Security Appliance), 9.24.1.155 (Adaptive Security Appliance), 9.24.1.11 (Adaptive Security Appliance), 7.0 (Cisco Secure Firewall Threat Defense (FTD)), 7.0.9 (Cisco Secure Firewall Threat Defense (FTD)), 7.2 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.11 (Cisco Secure Firewall Threat Defense (FTD)), 7.2.12 (Cisco Secure Firewall Threat Defense (FTD)), 7.3 (Cisco Secure Firewall Threat Defense (FTD)), 7.4 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.4 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.7 (Cisco Secure Firewall Threat Defense (FTD)), 7.4.8 (Cisco Secure Firewall Threat Defense (FTD)), 7.6 (Cisco Secure Firewall Threat Defense (FTD)), 7.6.4 (Cisco Secure Firewall Threat Defense (FTD)), 7.7 (Cisco Secure Firewall Threat Defense (FTD)), 7.7.11 (Cisco Secure Firewall Threat Defense (FTD)), 7.7.13 (Cisco Secure Firewall Threat Defense (FTD)), 10.0 (Cisco Secure Firewall Threat Defense (FTD)), 10.0.0 (Cisco Secure Firewall Threat Defense (FTD)), 10.0.2 (Cisco Secure Firewall Threat Defense (FTD))",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044f:\nhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-vpn-dos-dzv4mQFF",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "11.08.2026",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "14.08.2026",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "13.08.2026",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2026-11520",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u0434\u0440\u0443\u0433\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "CVE-2026-20349",
  "\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430",
  "\u041a\u043b\u0430\u0441\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u0434\u0430",
  "\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u041f\u041e": "Adaptive Security Appliance, Cisco Secure Firewall Threat Defense (FTD)",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u041e\u0421 \u0438 \u0442\u0438\u043f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b": null,
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0443\u0434\u0430\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0434\u043e\u0441\u0442\u0443\u043f\u0430 Remote Access SSL VPN \u043c\u0438\u043a\u0440\u043e\u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f \u043c\u0435\u0436\u0441\u0435\u0442\u0435\u0432\u044b\u0445 \u044d\u043a\u0440\u0430\u043d\u043e\u0432 Cisco Adaptive Security Appliance (ASA) \u0438 Cisco Secure Firewall Threat Defense (FTD), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0421\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u0435\u0442",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u041d\u0435\u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u0430\u044f \u043e\u0447\u0438\u0441\u0442\u043a\u0430 \u043a\u0443\u0447\u0438 \u043f\u0435\u0440\u0435\u0434 \u0435\u0435 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0435\u043d\u0438\u0435\u043c (CWE-244)",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0443\u0434\u0430\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0434\u043e\u0441\u0442\u0443\u043f\u0430 Remote Access SSL VPN \u043c\u0438\u043a\u0440\u043e\u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f \u043c\u0435\u0436\u0441\u0435\u0442\u0435\u0432\u044b\u0445 \u044d\u043a\u0440\u0430\u043d\u043e\u0432 Cisco Adaptive Security Appliance (ASA) \u0438 Cisco Secure Firewall Threat Defense (FTD) \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u043d\u0435\u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u043e\u0439 \u043e\u0447\u0438\u0441\u0442\u043a\u043e\u0439 \u0434\u0438\u043d\u0430\u043c\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e, \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u043c\u0443 \u0443\u0434\u0430\u043b\u0435\u043d\u043d\u043e, \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": null,
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u041c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0430\u043c\u0438 \u0434\u0430\u043d\u043d\u044b\u0445",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-vpn-dos-dzv4mQFF\nhttps://www.cisa.gov/news-events/alerts/2026/08/11/cisa-adds-three-known-exploited-vulnerabilities-catalog?_sp=66f416c1-1751-4a6d-ac96-6a016c2bdb43.1786603485565\nhttps://www.cybersecuritydive.com/news/cisco-firewall-vulnerabilities-vpn-crash/827688/\nhttps://socprime.com/blog/cve-2026-20349-actively-exploited-cisco-asa-and-ftd-flaw-enables-remote-dos/\nhttps://www.cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041f\u041e \u0441\u0435\u0442\u0435\u0432\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e-\u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0433\u043e \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430, \u0421\u0440\u0435\u0434\u0441\u0442\u0432\u043e \u0437\u0430\u0449\u0438\u0442\u044b",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-244",
  "\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0412\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 2.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 7,8)\n\u0412\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.1 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 8,6)"
}

CVE-2026-20349 (GCVE-0-2026-20349)

Vulnerability from cvelistv5 – Published: 2026-08-11 17:06 – Updated: 2026-09-16 20:15

Title

Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SSL VPN Denial of Service Vulnerability

Summary

A vulnerability in the Remote Access SSL VPN service for Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to insufficient error checking when processing HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to the Remote Access SSL VPN service on an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

Severity

8.6 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

SSVC

Exploitation: active Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-11 00:00 UTC

CWE

CWE-244 - Improper Clearing of Heap Memory Before Release ('Heap Inspection')

Assigner

cisco mitre root

References

2 references

URL	Tags
https://sec.cloudapps.cisco.com/security/center/c…
https://www.cisa.gov/known-exploited-vulnerabilit…	government-resource

Impacted products

2 products

Vendor	Product	Version
Cisco	Cisco Secure Firewall Adaptive Security Appliance (ASA) Software	Affected: 9.16.1 Affected: 9.16.1.28 Affected: 9.16.2 Affected: 9.16.2.3 Affected: 9.16.2.7 Affected: 9.16.2.11 Affected: 9.16.2.13 Affected: 9.16.2.14 Affected: 9.16.3.3 Affected: 9.16.3 Affected: 9.16.3.14 Affected: 9.18.1 Affected: 9.16.3.15 Affected: 9.18.1.3 Affected: 9.18.2 Affected: 9.16.3.19 Affected: 9.16.3.23 Affected: 9.18.2.5 Affected: 9.16.4 Affected: 9.18.2.7 Affected: 9.19.1 Affected: 9.16.4.9 Affected: 9.18.2.8 Affected: 9.16.4.14 Affected: 9.18.3 Affected: 9.19.1.5 Affected: 9.16.4.18 Affected: 9.19.1.9 Affected: 9.18.3.39 Affected: 9.16.4.19 Affected: 9.19.1.12 Affected: 9.18.3.46 Affected: 9.16.4.27 Affected: 9.19.1.18 Affected: 9.18.3.53 Affected: 9.18.3.55 Affected: 9.16.4.38 Affected: 9.16.4.39 Affected: 9.18.3.56 Affected: 9.20.1 Affected: 9.16.4.42 Affected: 9.19.1.22 Affected: 9.18.4 Affected: 9.20.1.5 Affected: 9.18.4.5 Affected: 9.19.1.24 Affected: 9.16.4.48 Affected: 9.18.4.8 Affected: 9.20.2 Affected: 9.19.1.27 Affected: 9.16.4.55 Affected: 9.18.4.22 Affected: 9.20.2.10 Affected: 9.16.4.57 Affected: 9.19.1.28 Affected: 9.18.4.24 Affected: 9.20.2.21 Affected: 9.16.4.61 Affected: 9.19.1.31 Affected: 9.18.4.29 Affected: 9.20.2.22 Affected: 9.16.4.62 Affected: 9.18.4.34 Affected: 9.20.3 Affected: 9.16.4.67 Affected: 9.16.4.70 Affected: 9.18.4.40 Affected: 9.23.1 Affected: 9.22.1.1 Affected: 9.16.4.71 Affected: 9.20.3.4 Affected: 9.18.4.47 Affected: 9.20.3.7 Affected: 9.19.1.37 Affected: 9.16.4.76 Affected: 9.20.3.9 Affected: 9.19.1.38 Affected: 9.18.4.50 Affected: 9.22.1.3 Affected: 9.20.3.10 Affected: 9.22.1.2 Affected: 9.18.4.52 Affected: 9.20.3.13 Affected: 9.22.1.6 Affected: 9.18.4.53 Affected: 9.16.4.82 Affected: 9.22.2 Affected: 9.20.3.16 Affected: 9.19.1.42 Affected: 9.18.4.57 Affected: 9.16.4.84 Affected: 9.23.1.3 Affected: 9.20.3.20 Affected: 9.22.2.4 Affected: 9.23.1.7 Affected: 9.20.4 Affected: 9.22.2.9 Affected: 9.23.1.13 Affected: 9.20.4.7 Affected: 9.22.2.13 Affected: 9.18.4.66 Affected: 9.20.4.10 Affected: 9.23.1.19 Affected: 9.16.4.85 Affected: 9.22.2.14 Affected: 9.18.4.67 Affected: 9.24.1 Affected: 9.18.4.68 Affected: 9.23.1.22 Affected: 9.20.4.14 Affected: 9.22.2.20 Affected: 9.18.4.71 Affected: 9.20.4.19 Affected: 9.23.1.26 Affected: 9.16.4.89 Affected: 9.22.2.32 Affected: 9.18.4.76 Affected: 9.22.3 Affected: 9.24.1.5 Affected: 9.20.4.22 Affected: 9.24.1.9 Affected: 9.20.4.28 Affected: 9.22.3.5 Affected: 9.16.4.92 Affected: 9.18.4.135 Affected: 9.23.1.195 Affected: 9.20.4.30 Affected: 9.24.1.155 Affected: 9.23.1.32 Affected: 9.24.1.11 Affected: 9.20.4.34 Affected: 9.18.4.82
Cisco	Cisco Secure Firewall Threat Defense (FTD) Software	Affected: 7.0.0 Affected: 7.0.0.1 Affected: 7.0.1 Affected: 7.0.1.1 Affected: 7.0.2 Affected: 7.2.0 Affected: 7.0.2.1 Affected: 7.0.3 Affected: 7.2.0.1 Affected: 7.0.4 Affected: 7.2.1 Affected: 7.0.5 Affected: 7.3.0 Affected: 7.2.2 Affected: 7.2.3 Affected: 7.3.1 Affected: 7.2.4 Affected: 7.0.6 Affected: 7.2.5 Affected: 7.2.4.1 Affected: 7.3.1.1 Affected: 7.4.0 Affected: 7.0.6.1 Affected: 7.2.5.1 Affected: 7.4.1 Affected: 7.2.6 Affected: 7.0.6.2 Affected: 7.4.1.1 Affected: 7.2.7 Affected: 7.2.5.2 Affected: 7.3.1.2 Affected: 7.2.8 Affected: 7.6.0 Affected: 7.4.2 Affected: 7.2.8.1 Affected: 7.0.6.3 Affected: 7.4.2.1 Affected: 7.2.9 Affected: 7.0.7 Affected: 7.7.0 Affected: 7.4.2.2 Affected: 7.2.10 Affected: 7.6.1 Affected: 7.4.2.3 Affected: 7.0.8 Affected: 7.6.2 Affected: 7.7.10 Affected: 7.7.11 Affected: 7.0.8.1 Affected: 7.6.2.1 Affected: 7.7.10.1 Affected: 7.4.2.4 Affected: 7.2.10.2 Affected: 7.4.3 Affected: 7.6.4 Affected: 10.0.0 Affected: 7.4.4 Affected: 7.0.9 Affected: 7.2.11 Affected: 7.4.7 Affected: 10.0.2

Show details on NVD website

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20349",
                "options": [
                  {
                    "Exploitation": "active"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-11T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          },
          {
            "other": {
              "content": {
                "dateAdded": "2026-08-11",
                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20349"
              },
              "type": "kev"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-12T04:00:28.075Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "government-resource"
            ],
            "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20349"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-08-11T00:00:00.000Z",
            "value": "CVE-2026-20349 added to CISA KEV"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "Cisco Secure Firewall Adaptive Security Appliance (ASA) Software",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "9.16.1"
            },
            {
              "status": "affected",
              "version": "9.16.1.28"
            },
            {
              "status": "affected",
              "version": "9.16.2"
            },
            {
              "status": "affected",
              "version": "9.16.2.3"
            },
            {
              "status": "affected",
              "version": "9.16.2.7"
            },
            {
              "status": "affected",
              "version": "9.16.2.11"
            },
            {
              "status": "affected",
              "version": "9.16.2.13"
            },
            {
              "status": "affected",
              "version": "9.16.2.14"
            },
            {
              "status": "affected",
              "version": "9.16.3.3"
            },
            {
              "status": "affected",
              "version": "9.16.3"
            },
            {
              "status": "affected",
              "version": "9.16.3.14"
            },
            {
              "status": "affected",
              "version": "9.18.1"
            },
            {
              "status": "affected",
              "version": "9.16.3.15"
            },
            {
              "status": "affected",
              "version": "9.18.1.3"
            },
            {
              "status": "affected",
              "version": "9.18.2"
            },
            {
              "status": "affected",
              "version": "9.16.3.19"
            },
            {
              "status": "affected",
              "version": "9.16.3.23"
            },
            {
              "status": "affected",
              "version": "9.18.2.5"
            },
            {
              "status": "affected",
              "version": "9.16.4"
            },
            {
              "status": "affected",
              "version": "9.18.2.7"
            },
            {
              "status": "affected",
              "version": "9.19.1"
            },
            {
              "status": "affected",
              "version": "9.16.4.9"
            },
            {
              "status": "affected",
              "version": "9.18.2.8"
            },
            {
              "status": "affected",
              "version": "9.16.4.14"
            },
            {
              "status": "affected",
              "version": "9.18.3"
            },
            {
              "status": "affected",
              "version": "9.19.1.5"
            },
            {
              "status": "affected",
              "version": "9.16.4.18"
            },
            {
              "status": "affected",
              "version": "9.19.1.9"
            },
            {
              "status": "affected",
              "version": "9.18.3.39"
            },
            {
              "status": "affected",
              "version": "9.16.4.19"
            },
            {
              "status": "affected",
              "version": "9.19.1.12"
            },
            {
              "status": "affected",
              "version": "9.18.3.46"
            },
            {
              "status": "affected",
              "version": "9.16.4.27"
            },
            {
              "status": "affected",
              "version": "9.19.1.18"
            },
            {
              "status": "affected",
              "version": "9.18.3.53"
            },
            {
              "status": "affected",
              "version": "9.18.3.55"
            },
            {
              "status": "affected",
              "version": "9.16.4.38"
            },
            {
              "status": "affected",
              "version": "9.16.4.39"
            },
            {
              "status": "affected",
              "version": "9.18.3.56"
            },
            {
              "status": "affected",
              "version": "9.20.1"
            },
            {
              "status": "affected",
              "version": "9.16.4.42"
            },
            {
              "status": "affected",
              "version": "9.19.1.22"
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            {
              "status": "affected",
              "version": "9.18.4"
            },
            {
              "status": "affected",
              "version": "9.20.1.5"
            },
            {
              "status": "affected",
              "version": "9.18.4.5"
            },
            {
              "status": "affected",
              "version": "9.19.1.24"
            },
            {
              "status": "affected",
              "version": "9.16.4.48"
            },
            {
              "status": "affected",
              "version": "9.18.4.8"
            },
            {
              "status": "affected",
              "version": "9.20.2"
            },
            {
              "status": "affected",
              "version": "9.19.1.27"
            },
            {
              "status": "affected",
              "version": "9.16.4.55"
            },
            {
              "status": "affected",
              "version": "9.18.4.22"
            },
            {
              "status": "affected",
              "version": "9.20.2.10"
            },
            {
              "status": "affected",
              "version": "9.16.4.57"
            },
            {
              "status": "affected",
              "version": "9.19.1.28"
            },
            {
              "status": "affected",
              "version": "9.18.4.24"
            },
            {
              "status": "affected",
              "version": "9.20.2.21"
            },
            {
              "status": "affected",
              "version": "9.16.4.61"
            },
            {
              "status": "affected",
              "version": "9.19.1.31"
            },
            {
              "status": "affected",
              "version": "9.18.4.29"
            },
            {
              "status": "affected",
              "version": "9.20.2.22"
            },
            {
              "status": "affected",
              "version": "9.16.4.62"
            },
            {
              "status": "affected",
              "version": "9.18.4.34"
            },
            {
              "status": "affected",
              "version": "9.20.3"
            },
            {
              "status": "affected",
              "version": "9.16.4.67"
            },
            {
              "status": "affected",
              "version": "9.16.4.70"
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            {
              "status": "affected",
              "version": "9.18.4.40"
            },
            {
              "status": "affected",
              "version": "9.23.1"
            },
            {
              "status": "affected",
              "version": "9.22.1.1"
            },
            {
              "status": "affected",
              "version": "9.16.4.71"
            },
            {
              "status": "affected",
              "version": "9.20.3.4"
            },
            {
              "status": "affected",
              "version": "9.18.4.47"
            },
            {
              "status": "affected",
              "version": "9.20.3.7"
            },
            {
              "status": "affected",
              "version": "9.19.1.37"
            },
            {
              "status": "affected",
              "version": "9.16.4.76"
            },
            {
              "status": "affected",
              "version": "9.20.3.9"
            },
            {
              "status": "affected",
              "version": "9.19.1.38"
            },
            {
              "status": "affected",
              "version": "9.18.4.50"
            },
            {
              "status": "affected",
              "version": "9.22.1.3"
            },
            {
              "status": "affected",
              "version": "9.20.3.10"
            },
            {
              "status": "affected",
              "version": "9.22.1.2"
            },
            {
              "status": "affected",
              "version": "9.18.4.52"
            },
            {
              "status": "affected",
              "version": "9.20.3.13"
            },
            {
              "status": "affected",
              "version": "9.22.1.6"
            },
            {
              "status": "affected",
              "version": "9.18.4.53"
            },
            {
              "status": "affected",
              "version": "9.16.4.82"
            },
            {
              "status": "affected",
              "version": "9.22.2"
            },
            {
              "status": "affected",
              "version": "9.20.3.16"
            },
            {
              "status": "affected",
              "version": "9.19.1.42"
            },
            {
              "status": "affected",
              "version": "9.18.4.57"
            },
            {
              "status": "affected",
              "version": "9.16.4.84"
            },
            {
              "status": "affected",
              "version": "9.23.1.3"
            },
            {
              "status": "affected",
              "version": "9.20.3.20"
            },
            {
              "status": "affected",
              "version": "9.22.2.4"
            },
            {
              "status": "affected",
              "version": "9.23.1.7"
            },
            {
              "status": "affected",
              "version": "9.20.4"
            },
            {
              "status": "affected",
              "version": "9.22.2.9"
            },
            {
              "status": "affected",
              "version": "9.23.1.13"
            },
            {
              "status": "affected",
              "version": "9.20.4.7"
            },
            {
              "status": "affected",
              "version": "9.22.2.13"
            },
            {
              "status": "affected",
              "version": "9.18.4.66"
            },
            {
              "status": "affected",
              "version": "9.20.4.10"
            },
            {
              "status": "affected",
              "version": "9.23.1.19"
            },
            {
              "status": "affected",
              "version": "9.16.4.85"
            },
            {
              "status": "affected",
              "version": "9.22.2.14"
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            {
              "status": "affected",
              "version": "9.18.4.67"
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            {
              "status": "affected",
              "version": "9.24.1"
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            {
              "status": "affected",
              "version": "9.18.4.68"
            },
            {
              "status": "affected",
              "version": "9.23.1.22"
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            {
              "status": "affected",
              "version": "9.20.4.14"
            },
            {
              "status": "affected",
              "version": "9.22.2.20"
            },
            {
              "status": "affected",
              "version": "9.18.4.71"
            },
            {
              "status": "affected",
              "version": "9.20.4.19"
            },
            {
              "status": "affected",
              "version": "9.23.1.26"
            },
            {
              "status": "affected",
              "version": "9.16.4.89"
            },
            {
              "status": "affected",
              "version": "9.22.2.32"
            },
            {
              "status": "affected",
              "version": "9.18.4.76"
            },
            {
              "status": "affected",
              "version": "9.22.3"
            },
            {
              "status": "affected",
              "version": "9.24.1.5"
            },
            {
              "status": "affected",
              "version": "9.20.4.22"
            },
            {
              "status": "affected",
              "version": "9.24.1.9"
            },
            {
              "status": "affected",
              "version": "9.20.4.28"
            },
            {
              "status": "affected",
              "version": "9.22.3.5"
            },
            {
              "status": "affected",
              "version": "9.16.4.92"
            },
            {
              "status": "affected",
              "version": "9.18.4.135"
            },
            {
              "status": "affected",
              "version": "9.23.1.195"
            },
            {
              "status": "affected",
              "version": "9.20.4.30"
            },
            {
              "status": "affected",
              "version": "9.24.1.155"
            },
            {
              "status": "affected",
              "version": "9.23.1.32"
            },
            {
              "status": "affected",
              "version": "9.24.1.11"
            },
            {
              "status": "affected",
              "version": "9.20.4.34"
            },
            {
              "status": "affected",
              "version": "9.18.4.82"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "Cisco Secure Firewall Threat Defense (FTD) Software",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "7.0.0"
            },
            {
              "status": "affected",
              "version": "7.0.0.1"
            },
            {
              "status": "affected",
              "version": "7.0.1"
            },
            {
              "status": "affected",
              "version": "7.0.1.1"
            },
            {
              "status": "affected",
              "version": "7.0.2"
            },
            {
              "status": "affected",
              "version": "7.2.0"
            },
            {
              "status": "affected",
              "version": "7.0.2.1"
            },
            {
              "status": "affected",
              "version": "7.0.3"
            },
            {
              "status": "affected",
              "version": "7.2.0.1"
            },
            {
              "status": "affected",
              "version": "7.0.4"
            },
            {
              "status": "affected",
              "version": "7.2.1"
            },
            {
              "status": "affected",
              "version": "7.0.5"
            },
            {
              "status": "affected",
              "version": "7.3.0"
            },
            {
              "status": "affected",
              "version": "7.2.2"
            },
            {
              "status": "affected",
              "version": "7.2.3"
            },
            {
              "status": "affected",
              "version": "7.3.1"
            },
            {
              "status": "affected",
              "version": "7.2.4"
            },
            {
              "status": "affected",
              "version": "7.0.6"
            },
            {
              "status": "affected",
              "version": "7.2.5"
            },
            {
              "status": "affected",
              "version": "7.2.4.1"
            },
            {
              "status": "affected",
              "version": "7.3.1.1"
            },
            {
              "status": "affected",
              "version": "7.4.0"
            },
            {
              "status": "affected",
              "version": "7.0.6.1"
            },
            {
              "status": "affected",
              "version": "7.2.5.1"
            },
            {
              "status": "affected",
              "version": "7.4.1"
            },
            {
              "status": "affected",
              "version": "7.2.6"
            },
            {
              "status": "affected",
              "version": "7.0.6.2"
            },
            {
              "status": "affected",
              "version": "7.4.1.1"
            },
            {
              "status": "affected",
              "version": "7.2.7"
            },
            {
              "status": "affected",
              "version": "7.2.5.2"
            },
            {
              "status": "affected",
              "version": "7.3.1.2"
            },
            {
              "status": "affected",
              "version": "7.2.8"
            },
            {
              "status": "affected",
              "version": "7.6.0"
            },
            {
              "status": "affected",
              "version": "7.4.2"
            },
            {
              "status": "affected",
              "version": "7.2.8.1"
            },
            {
              "status": "affected",
              "version": "7.0.6.3"
            },
            {
              "status": "affected",
              "version": "7.4.2.1"
            },
            {
              "status": "affected",
              "version": "7.2.9"
            },
            {
              "status": "affected",
              "version": "7.0.7"
            },
            {
              "status": "affected",
              "version": "7.7.0"
            },
            {
              "status": "affected",
              "version": "7.4.2.2"
            },
            {
              "status": "affected",
              "version": "7.2.10"
            },
            {
              "status": "affected",
              "version": "7.6.1"
            },
            {
              "status": "affected",
              "version": "7.4.2.3"
            },
            {
              "status": "affected",
              "version": "7.0.8"
            },
            {
              "status": "affected",
              "version": "7.6.2"
            },
            {
              "status": "affected",
              "version": "7.7.10"
            },
            {
              "status": "affected",
              "version": "7.7.11"
            },
            {
              "status": "affected",
              "version": "7.0.8.1"
            },
            {
              "status": "affected",
              "version": "7.6.2.1"
            },
            {
              "status": "affected",
              "version": "7.7.10.1"
            },
            {
              "status": "affected",
              "version": "7.4.2.4"
            },
            {
              "status": "affected",
              "version": "7.2.10.2"
            },
            {
              "status": "affected",
              "version": "7.4.3"
            },
            {
              "status": "affected",
              "version": "7.6.4"
            },
            {
              "status": "affected",
              "version": "10.0.0"
            },
            {
              "status": "affected",
              "version": "7.4.4"
            },
            {
              "status": "affected",
              "version": "7.0.9"
            },
            {
              "status": "affected",
              "version": "7.2.11"
            },
            {
              "status": "affected",
              "version": "7.4.7"
            },
            {
              "status": "affected",
              "version": "10.0.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability in the Remote Access SSL VPN service for Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition.\u0026nbsp;\r\n\r\nThis vulnerability is due to insufficient error checking when processing HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to the Remote Access SSL VPN service on an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "In August 2026, the Cisco PSIRT became aware of active exploitation of this vulnerability. Cisco strongly recommends that customers upgrade to a fixed software release to remediate this vulnerability."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "cvssV3_1"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-244",
              "description": "Improper Clearing of Heap Memory Before Release (\u0027Heap Inspection\u0027)",
              "lang": "en",
              "type": "cwe"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-16T20:15:35.860Z",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "name": "cisco-sa-asaftd-vpn-dos-dzv4mQFF",
          "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-vpn-dos-dzv4mQFF"
        }
      ],
      "source": {
        "advisory": "cisco-sa-asaftd-vpn-dos-dzv4mQFF",
        "defects": [
          "CSCwv96220"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SSL VPN Denial of Service Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2026-20349",
    "datePublished": "2026-08-11T17:06:03.091Z",
    "dateReserved": "2025-10-08T11:59:15.413Z",
    "dateUpdated": "2026-09-16T20:15:35.860Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

BDU:2026-11520 (CVE-2026-20349)

CVE-2026-20349 (GCVE-0-2026-20349)

Tags

Sightings

Nomenclature

Related by attack behaviour