Format string error in SonicOS - CVE-2026-0400

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Main Vulnerability Database Vulnerabilities #VU123197

Format string error in SonicOS - CVE-2026-0400

Published: February 24, 2026


Vulnerability identifier: #VU123197
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-0400
CWE-ID: CWE-134
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: SonicWall
Affected software:
SonicOS

Detailed vulnerability description

The vulnerability allows a remote user to perform a denial of service attack.

The vulnerability exists due to a format string error. A remote privileged user can supply a specially crafted input to the system and perform a denial of service attack


How to mitigate CVE-2026-0400

Install updates from vendor's website.

Sources