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

> CVE-2021-20035: SonicWall SMA100 Appliances OS Command Injection Vulnerability. CVSS 6.5 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2021-20035
Last updated: 2025-10-21T23:25:31Z

- Published: 2021-09-27 17:20 UTC · Updated: 2025-10-21 23:25 UTC · Assigner: sonicwall
- CVSS: 6.5 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS: 4.4%, 91th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2025-04-16, federal due date 2025-05-07, ransomware use: Unknown
- CWE: CWE-78

## Description

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.

## CISA 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.

## Affected vendors and products

- SonicWall: SMA100

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2021-20035)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2021-20035)
- [https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0022](https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0022)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2021-20035 · Markdown: https://rewindex.com/cve/CVE-2021-20035.md · JSON: https://rewindex.com/api/v1/cves/CVE-2021-20035 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:11:18.023Z