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

Source: https://junglewise.ai/threats/cve-2021-20035-sonicwall-sma100-appliances-os-command-injection-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-04-16. Updated: 2026-05-09  
License: CC BY 4.0 with a link back

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](https://junglewise.ai/threats/technologies/sma100). Vendors: [SonicWall](https://junglewise.ai/threats/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

## Related threats

- [SonicWall SMA100 Appliances OS Command Injection Vulnerability](https://junglewise.ai/threats/cve-2023-44221-sonicwall-sma100-appliances-os-command-injection-vulnerability)
- [SonicWall SMA100 Directory Traversal Vulnerability](https://junglewise.ai/threats/cve-2019-7483-sonicwall-sma100-directory-traversal-vulnerability)
- [SonicWall SMA100 SQL Injection Vulnerability](https://junglewise.ai/threats/cve-2019-7481-sonicwall-sma100-sql-injection-vulnerability)