SonicOS Stack-Based Buffer Overflow in Cert Handling Enables Crash
CVE-2026-3439 Published on March 4, 2026
A post-authentication Stack-based Buffer Overflow vulnerability in SonicOS certificate handling allows a remote attacker to crash a firewall.
Vulnerability Analysis
CVE-2026-3439 can be exploited with network access, and requires user privileges. 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-2026-3439 has been classified to as a Stack Overflow vulnerability or weakness.
Products Associated with CVE-2026-3439
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Affected Versions
SonicWall SonicOS:- Version 7.0.1-5169 and older versions is affected.
- Version 7.3.1-7013 and older versions is affected.
- Version 8.1.0-8017 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.