CVE-2025-11838

High · 7.5

CVSS

7.5

EPSS

0.5%

Published

Dec 4, 2025

CISA due date

—

The record

A memory corruption vulnerability in WatchGuard Fireware OS may allow an unauthenticated attacker to trigger a Denial of Service (DoS) condition in the Mobile User VPN with IKEv2 and the Branch Office VPN using IKEv2 when configured with a dynamic gateway peer. This vulnerability affects Fireware OS 12.6.1 up to and including 12.11.4 and 2025.1 up to and including 2025.1.2.

Affected packages

Ecosystem	Package	Introduced	Fixed