CVE-2021-20035
SonicWall SMA100 Appliances OS Command Injection Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
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.
CISA notes
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0022 ; https://nvd.nist.gov/vuln/detail/CVE-2021-20035
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.
Severity
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitation Context
as of October 15, 2026- CISA added CVE-2021-20035 to the KEV catalog 1,297 days after its CVE record was published. The median for entries added in 2025 is 26 days.
- It is one of 19 SonicWall entries in the CISA KEV catalog, and one of 5 added in 2025.
- Its current EPSS score (4.2%) is higher than that of 16% of CISA KEV entries.
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| SonicWall | SonicWall SMA100 | 9.0.0.10-28sv and earlier 10.2.0.7-34sv and earlier 10.2.1.0-17sv and earlier |
References
1 LinksRecord Details
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Related
Tool categories
CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.