CVE-2026-20056 (GCVE-0-2026-20056)
Vulnerability from cvelistv5 – Published: 2026-02-04 16:11 – Updated: 2026-02-04 16:40
VLAI?
Title
Cisco Secure Web Appliance TBD Bypass Vulnerability
Summary
A vulnerability in the Dynamic Vectoring and Streaming (DVS) Engine implementation of Cisco AsyncOS Software for Cisco Secure Web Appliance could allow an unauthenticated, remote attacker to bypass the anti-malware scanner, allowing malicious archive files to be downloaded.
This vulnerability is due to improper handling of certain archive files. An attacker could exploit this vulnerability by sending a crafted archive file, which should be blocked, through an affected device. A successful exploit could allow the attacker to bypass the anti-malware scanner and download malware onto an end user workstation. The downloaded malware will not automatically execute unless the end user extracts and launches the malicious file.
Severity ?
4 (Medium)
CWE
- CWE-494 - Download of Code Without Integrity Check
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Cisco | Cisco Secure Web Appliance |
Affected:
11.8.0-453
Affected: 12.5.3-002 Affected: 12.0.3-007 Affected: 12.0.3-005 Affected: 14.1.0-032 Affected: 14.1.0-047 Affected: 14.1.0-041 Affected: 12.0.4-002 Affected: 14.0.2-012 Affected: 11.8.0-414 Affected: 12.0.1-268 Affected: 11.8.1-023 Affected: 11.8.3-021 Affected: 11.8.3-018 Affected: 12.5.1-011 Affected: 11.8.4-004 Affected: 12.5.2-007 Affected: 12.5.2-011 Affected: 14.5.0-498 Affected: 12.5.4-005 Affected: 12.5.4-011 Affected: 12.0.5-011 Affected: 14.0.3-014 Affected: 12.5.5-004 Affected: 12.5.5-005 Affected: 12.5.5-008 Affected: 14.0.4-005 Affected: 14.5.1-008 Affected: 14.5.1-016 Affected: 15.0.0-355 Affected: 15.0.0-322 Affected: 12.5.6-008 Affected: 15.1.0-287 Affected: 14.5.2-011 Affected: 15.2.0-116 Affected: 14.0.5-007 Affected: 15.2.0-164 Affected: 14.5.1-510 Affected: 12.0.2-012 Affected: 12.0.2-004 Affected: 14.5.1-607 Affected: 14.5.3-033 Affected: 15.0.1-004 Affected: 15.2.1-011 Affected: 14.5.0-673 Affected: 14.5.0-537 Affected: 12.0.1-334 Affected: 14.0.1-503 Affected: 14.0.1-053 Affected: 11.8.0-429 Affected: 14.0.1-040 Affected: 14.0.1-014 Affected: 12.5.1-043 Affected: 15.2.2-009 Affected: 15.5.0-566 Affected: 15.2.3-007 Affected: 15.5.0-574 Affected: 15.5.0-710 Affected: 15.2.4-022 Affected: 15.5.1-002 |
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Sightings
| Author | Source | Type | Date |
|---|
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.
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