Secure Mobile Access (SMA)
CVE-2021-20041: An unauthenticated and remote adversary can consume all of the device's CPU due to crafted HTTP requests se…
An unauthenticated and remote adversary can consume all of the device's CPU due to crafted HTTP requests sent to SMA100 /fileshare/sonicfiles/sonicfiles resulting in a loop with unreachable exit condition.
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 9.0 | See the advisory |
| SonicWall SMA100 10.2 | See the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
An unauthenticated and remote adversary can consume all of the device's CPU due to crafted HTTP requests sent to SMA100 /fileshare/sonicfiles/sonicfiles resulting in a loop with unreachable exit condition. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.