CVE-2021-20035: SonicWall SMA100 Appliances OS Command Injection Vulnerability

CVE-2021-20035 · Severity: critical · CVSS 6.5 · Exploited in the wild · Published 2025-04-16

SonicWall SMA100 appliances contain an OS command injection vulnerability in the management interface. A remote authenticated attacker can inject arbitrary commands as a 'nobody' user, potentially leading to code execution or denial of service.

Technologies: SonicWall SMA100. Vendors: SonicWall.

Quick answers

Is CVE-2021-20035 exploited in the wild?
Yes. CVE-2021-20035 is known to be exploited in the wild, first recorded on 16 April 2025. Treat it as urgent.
How severe is CVE-2021-20035?
Critical severity, with a CVSS score of 6.5, published 16 April 2025.
Which products and versions are affected?
SonicWall SMA 200 firmware up to (excluding) 9.0.0.11-31sv, 10.2.0.0 up to (excluding) 10.2.0.8-37sv, 10.2.1.0 up to (excluding) 10.2.1.1-19sv; SonicWall SMA 210 firmware up to (excluding) 9.0.0.11-31sv, 10.2.0.0 up to (excluding) 10.2.0.8-37sv, 10.2.1.0 up to (excluding) 10.2.1.1-19sv; SonicWall SMA 400 firmware up to (excluding) 9.0.0.11-31sv, 10.2.0.0 up to (excluding) 10.2.0.8-37sv, 10.2.1.0 up to (excluding) 10.2.1.1-19sv; SonicWall SMA 410 firmware up to (excluding) 9.0.0.11-31sv, 10.2.0.0 up to (excluding) 10.2.0.8-37sv, 10.2.1.0 up to (excluding) 10.2.1.1-19sv; and 1 more.
Is there a fix for CVE-2021-20035?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2021-20035 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2021-20035?
Check whether you run SonicWall SMA100 or SonicWall Sma100 Appliances. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • SonicWall SMA 200 firmware up to (excluding) 9.0.0.11-31sv, 10.2.0.0 up to (excluding) 10.2.0.8-37sv, 10.2.1.0 up to (excluding) 10.2.1.1-19sv
  • SonicWall SMA 210 firmware up to (excluding) 9.0.0.11-31sv, 10.2.0.0 up to (excluding) 10.2.0.8-37sv, 10.2.1.0 up to (excluding) 10.2.1.1-19sv
  • SonicWall SMA 400 firmware up to (excluding) 9.0.0.11-31sv, 10.2.0.0 up to (excluding) 10.2.0.8-37sv, 10.2.1.0 up to (excluding) 10.2.1.1-19sv
  • SonicWall SMA 410 firmware up to (excluding) 9.0.0.11-31sv, 10.2.0.0 up to (excluding) 10.2.0.8-37sv, 10.2.1.0 up to (excluding) 10.2.1.1-19sv
  • SonicWall SMA 500v firmware up to (excluding) 9.0.0.11-31sv, 10.2.0.0 up to (excluding) 10.2.0.8-37sv, 10.2.1.0 up to (excluding) 10.2.1.1-19sv

Timeline

  • 2025-04-16: disclosed
  • 2025-04-16: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2025-04-16: other: Published to NVD

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