NULL Pointer Deref in SonicOS Firewall PostAuth Crash Vulnerability
CVE-2026-0401 Published on February 24, 2026
A post-authentication NULL Pointer Dereference vulnerability in SonicOS allows a remote attacker to crash a firewall.
Vulnerability Analysis
CVE-2026-0401 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
NULL Pointer Dereference
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions.
Products Associated with CVE-2026-0401
Want to know whenever a new CVE is published for SonicWall Sonicos? stack.watch will email you.
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.