CVE-2026-93865#

Fireware OS Missing Authentication in FireCluster Sync Daemon Allows Remote Root Action Injection

Critical 9.2 CVSS v4.0 › Published 2026-10-27Updated 2026-10-27

Summary #

A missing authentication vulnerability in the Fireware OS FireCluster synchronization daemon allows a remote, unauthenticated attacker to invoke privileged system-level administrative actions by sending a specially crafted request to the FireCluster management IP when the clustering feature is enabled.

Product status #

Product	Affected	Not affected
Fireware OS
Default	>= 2025.1, < 2026.4, >= 12.0, < 12.12.4	>= 2026.4, >= 12.12.4
T15/T35	>= 12.0, < 12.5.22	>= 12.5.22

Required Configuration for Exposure #

This vulnerability affects Firebox appliances that are configured as a member of a FireCluster.

Weakness Type and Impact #

CWECWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWECWE-306Missing Authentication for Critical Function
CWECWE-862Missing Authorization
CAPECCAPEC-88OS Command Injection
CAPECCAPEC-115Authentication Bypass

Exploitation Status #

WatchGuard is not aware of any exploitation of this vulnerability in the wild.

Solution #

Fireware OS 2026.4, Fireware OS 12.12.4, Fireware OS 12.5.22

References #

Credits #

WatchGuard AI Security Researchfinder