CVE-2026-104381

Fireware OS Missing Authentication in FireCluster State Sync Allows BOVPN Tunnel Denial of Service

Published Oct 27, 2026 CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed
Description
A missing authentication vulnerability in Fireware OS's FireCluster state synchronization feature allows an unauthenticated attacker positioned on the cluster synchronization network segment to force premature VPN tunnel termination by sending crafted cluster synchronization traffic.

Remediation

Vendor Solution

Fireware OS 2026.4, Fireware OS 12.12.4, Fireware OS 12.5.22

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A missing authentication vulnerability in Fireware OS's FireCluster state synchronization feature allows an unauthenticated attacker positioned on the cluster synchronization network segment to force premature VPN tunnel termination by sending crafted cluster synchronization traffic.
Title Fireware OS Missing Authentication in FireCluster State Sync Allows BOVPN Tunnel Denial of Service
First Time appeared Watchguard
Watchguard fireware Os
Weaknesses CWE-294
CWE-306
CWE-345
CPEs cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*
Vendors & Products Watchguard
Watchguard fireware Os
References
Metrics cvssV4_0

{'score': 6, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
WatchGuard
Published
Updated
Nov 4, 2026, 8:27 PM
Reserved
Oct 1, 2026, 10:29 PM
Status
Awaiting Analysis
Published
Oct 27, 2026, 4:17 PM
Modified
Nov 4, 2026, 9:17 PM