CVE-2025-11838 HIGH

CVE-2025-11838: WatchGuard Firebox iked Memory Corruption Vulnerability

Vendor Watchguard
Product Fireware OS
Weakness CWE-763
Published December 4, 2025
Last update December 15, 2025
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

December 4, 2025 CVE published
December 15, 2025 Record updated