CVE-2026-0400

Severity CVSS v4.0:

Pending analysis

Type:

CWE-134 Format String Vulnerability

Publication date:

24/02/2026

Last modified:

24/02/2026

Description

A post-authentication Format String vulnerability in SonicOS allows a remote attacker to crash a firewall.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 4.90 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

4.90

Severity 3.x

MEDIUM

References to Advisories, Solutions, and Tools

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0001