CVE-2021-20035 (GCVE-0-2021-20035)

Vulnerability from cvelistv5 – Published: 2021-09-27 17:20 – Updated: 2025-10-21 23:25
VLAI CISA Previdian
Summary
Improper neutralization of special elements in the SMA100 management interface allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user which potentially leads to DoS.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-17 03:55 UTC
CWE
  • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
sonicwall CNA under the mitre root
CNA scorecard D 54/100 over 34 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
SonicWall SMA100 Affected: 9.0.0.10-28sv and earlier
Affected: 10.2.0.7-34sv and earlier
Affected: 10.2.1.0-17sv and earlier
guessed Create a notification for this product.
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 01fd93c6-19de-4895-b865-6eb5306eef01

Vulnerability ID: CVE-2021-20035

Status: Confirmed

Status Updated: 2025-04-16 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2025-04-16
Asserted: 2025-04-16
Scope
Notes: SonicWall SMA100 Appliances OS Command Injection Vulnerability | Affected: SonicWall / SMA100 Appliances | Description: SonicWall SMA100 appliances contain an OS command injection vulnerability in the management interface that allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user, which could potentially lead to code execution. | Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. | Due date: 2025-05-07 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0022 ; https://nvd.nist.gov/vuln/detail/CVE-2021-20035
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-78
Feed CISA Known Exploited Vulnerabilities Catalog
Product SMA100 Appliances
Due Date 2025-05-07
Date Added 2025-04-16
Vendorproject SonicWall
Vulnerabilityname SonicWall SMA100 Appliances OS Command Injection Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-02-02 12:26 UTC | Updated: 2026-11-04 13:35 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: bed89794-909f-4d81-b31d-924f3a5543e6

Vulnerability ID: CVE-2021-20035

Status: Confirmed

Status Updated: 2025-04-16 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2025-04-16
Asserted: 2025-04-16
Scope
Notes: KEVIntel entry: Improper neutralization of special elements in the SMA100 management interface allows a remote authenticated attacker to inject arbitrary commands... | Affected: SonicWall / SMA100 | CVSS: 6.5 (MEDIUM) | Used in malware: unknown | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title Improper neutralization of special elements in the SMA100 management interface allows a remote authenticated attacker to inject arbitrary commands...
Vendor SonicWall
Product SMA100
Added Date 2025-04-16T00:00:00.000Z
Cvss Score 6.5
Epss Score None
Cvss Severity MEDIUM
Epss Percentile None
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev False
References
Created: 2026-06-23 14:06 UTC | Updated: 2026-07-10 06:14 UTC
Show details on NVD website
To clipboard 

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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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