CVEs / CVE-2021-20035
CVE-2021-20035: SonicWall SMA100 Appliances OS Command Injection Vulnerability
- Known exploited in the CISA KEV catalog since 16 Apr 2025
- medium 6.5 CVSS 3.1 (NVD)
- EPSS 4.4% chance of exploitation in the next 30 days, higher than 91% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
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.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| SonicWall SMA100 | 9.0.0.10-28sv and earlier | — |
| SonicWall SMA100 | 10.2.0.7-34sv and earlier | — |
| SonicWall SMA100 | 10.2.1.0-17sv and earlier | — |
Exploitation
| In CISA KEV since | 16 Apr 2025 |
|---|---|
| Due date for US federal agencies | 7 May 2025 |
| Used in ransomware campaigns | Unknown |
| 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. |
Severity
| CVSS 3.1 | 6.5 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HScored by NVD |
|---|---|
| Weakness | CWE-78 |
References
- CVE-2021-20035 on NVD
- CVE-2021-20035 in the CISA KEV catalog
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0022 (cited by CISA)
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0022 Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20035 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.