Secure Mobile Access (SMA)
CVE-2021-20038: SMA 100 Appliances Stack-Based Buffer Overflow
A Stack-based buffer overflow vulnerability in SMA100 Apache httpd server's mod_cgi module environment variables allows a remote unauthenticated attacker to potentially execute code as a 'nobody' user in the appliance.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| SonicWall SMA100 10.2 | See the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
A Stack-based buffer overflow vulnerability in SMA100 Apache httpd server's mod_cgi module environment variables allows a remote unauthenticated attacker to potentially execute code as a 'nobody' user in the appliance. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions.
Exploitation
CISA lists this CVE as exploited in the wild since 28 Jan 2022, including in ransomware campaigns.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.