Known exploited · SonicWall
CVE-2024-40766: SonicWall SonicOS Improper Access Control Vulnerability
What it is
SonicWall SonicOS contains an improper access control vulnerability that could lead to unauthorized resource access and, under certain conditions, may cause the firewall to crash.
- Vendor
- SonicWall
- Product
- SonicOS
- Added to KEV
- September 9, 2024
- CISA due date
- September 30, 2024
- Ransomware use
- Known
- Weakness
- CWE-284: Improper Access Control
What CISA requires
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Forensic triage
No
What to do now
- Find every instance of SonicOS you run, including the forgotten ones, and check its version against the vendor advisory.
- Apply the vendor's fix or mitigation, before September 30, 2024 if you are bound by CISA's deadline, sooner if it faces the internet.
- Assume it was tried against you already: look for signs of exploitation from the date it was added, not from the day you patched.
References
H2 Security
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Start freeSource: CISA Known Exploited Vulnerabilities Catalog (public domain), catalog version 2026.10.01.