SonicOS SSLVPN Buffer Overflow Remote Unauth DoS
CVE-2025-40601 Published on November 20, 2025
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.
Vulnerability Analysis
CVE-2025-40601 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Stack Overflow Vulnerability?
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
CVE-2025-40601 has been classified to as a Stack Overflow vulnerability or weakness.
Products Associated with CVE-2025-40601
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Affected Versions
SonicWall SonicOS:- Version 7.3.0-7012 and older versions is affected.
- Version 8.0.2-8011 and older versions is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.