CVE-2021-20039

HIGH 8.8CVE-2021-20039 · Published 08/12/2021 · updated 17/06/2026

In short

CVE-2021-20039 is a HIGH (CVSS 8.8) vulnerability.
Chance of exploitation in the next 30 days (EPSS): 78.7%, higher than 99.6% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
—	No affected product versions are listed for this vulnerability yet.

Description

Improper neutralization of special elements in the SMA100 management interface '/cgi-bin/viewcert' POST http method allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.

References

packetstormsecurity.com/files/165563/SonicWall-SMA-100-Series-Authenticated-Command-Injection.html · Exploit
psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026 · Vendor Advisory
attackerkb.com/topics/9szJhq46lw/cve-2021-20039/rapid7-analysis

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