SonicOS firewalls
CVE-2024-40766: SonicOS Improper Access Control
An improper access control vulnerability has been identified in the SonicWall SonicOS management access, potentially leading to unauthorized resource access and in specific conditions, causing the firewall to crash.
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 |
|---|---|
| SonicOS (Gen5, Gen6, Gen7) 5.9 | See the advisory |
| SonicOS (Gen5, Gen6, Gen7) 6.5 | See the advisory |
| SonicOS (Gen5, Gen6, Gen7) 7.0 | See the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
An improper access control vulnerability has been identified in the SonicWall SonicOS management access, potentially leading to unauthorized resource access and in specific conditions, causing the firewall to crash. This issue affects SonicWall Firewall Gen 5 and Gen 6 devices, as well as Gen 7 devices running SonicOS 7.0.1-5035 and older versions.
Exploitation
CISA lists this CVE as exploited in the wild since 9 Sept 2024, including in ransomware campaigns.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.