CVE-2025-40601: A Stack-based buffer overflow vulnerability in the SonicOS SSLVPN service allows a remote unauthenticated attacker to…
CVE-2025-40601 · Severity: high · CVSS 7.5 · Published 2025-11-20
A Stack-based buffer overflow vulnerability in the SonicOS SSLVPN service allows a remote unauthenticated attacker to cause Denial of Service (DoS), which could cause an impacted firewall to crash.
No. Junglewise Threat Intelligence has no report of CVE-2025-40601 being exploited in the wild.
How severe is CVE-2025-40601?
High severity, with a CVSS score of 7.5, published 20 November 2025.
Which products and versions are affected?
SonicWall Nsa 2700, SonicWall Nsa 2800, SonicWall Nsa 3700, SonicWall Nsa 3800 and 29 more. The advisory does not name versions.
Is there a fix for CVE-2025-40601?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-40601?
Check whether you run SonicWall Nsa 2700, SonicWall Nsa 2800, SonicWall Nsa 3700 or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.