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CVE-2026-0400

MEDIUM CVSS 3.1: 4.9 EPSS 0.22%
Updated Feb 24, 2026
Parameter Value
CVSS 4.9 (MEDIUM)
Type CWE-134 (Use of Externally-Controlled Format String)
Public PoC No

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

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
High
Admin privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Weakness Type (CWE)

CWE-134 Use of Externally-Controlled Format String

References 1

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