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TI-2026-81384 Aliases CVE-2026-104381GHSA-3qq2-3hjm-m64g

Fireware OS FireCluster sync flaw lets attackers drop BOVPN tunnels

Priority LOW 26CWE-294Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-294.

Summary

WatchGuard Fireware OS from 2025.1 before 2026.4, from 12.0 before 12.12.4, and from 12.0 before 12.5.22 is affected. The FireCluster state synchronization feature lacks authentication (CWE-306), so it accepts cluster synchronization traffic without verifying its origin. An unauthenticated attacker on the cluster synchronization network segment can force premature VPN tunnel termination by sending crafted synchronization traffic.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00133 2nd percentileScored 2026-11-07
Fix Fixed Fireware OS (WatchGuard): 2026.4, 12.12.4, 12.5.22

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
WatchGuardFireware OS2025.1 to before 2026.4; 12.0 to before 12.12.42026.4, 12.12.4Patch availableCNA
WatchGuardFireware OS12.0 to before 12.5.2212.5.22Patch availableCNA
  • Fireware OS VendorWatchGuard Affected 2025.1 to before 2026.4; 12.0 to before 12.12.4 Fixed in 2026.4, 12.12.4 Patch available CNA
  • Fireware OS VendorWatchGuard Affected 12.0 to before 12.5.22 Fixed in 12.5.22 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*——WatchGuard
  • cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:* Versions — — ·WatchGuard

Remediation

Fireware OS is fixed in 2026.4, 12.12.4 and 12.5.22. Upgrade each affected release line to the fixed version that matches it.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

  • Fix · CNA Fireware OS (WatchGuard) Fixed in 2026.4, 12.12.4
  • Fix · CNA Fireware OS (WatchGuard) Fixed in 12.5.22

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    WatchGuard Fireware OS 12.12.4, 2026.4

    17 records Highest priority Priority MEDIUM 9 MEDIUM, 8 LOW

    Other records, highest priority first

    • TI-2026-81380 Fireware OS FireCluster Daemon Lacks Authentication, Allows Remote Root ActionsPriority MEDIUM 48
    • TI-2026-81377 Stack buffer overflow in WatchGuard Fireware OS SIP proxyPriority MEDIUM 48
    • TI-2026-81386 NULL pointer dereference in WatchGuard Fireware OS management loginPriority MEDIUM 44
    Show all 17 records →
  • Release ·

    WatchGuard Fireware OS 12.5.22

    14 records Highest priority Priority MEDIUM 8 MEDIUM, 6 LOW

    Other records, highest priority first

    • TI-2026-81380 Fireware OS FireCluster Daemon Lacks Authentication, Allows Remote Root ActionsPriority MEDIUM 48
    • TI-2026-81377 Stack buffer overflow in WatchGuard Fireware OS SIP proxyPriority MEDIUM 48
    • TI-2026-81386 NULL pointer dereference in WatchGuard Fireware OS management loginPriority MEDIUM 44
    Show all 14 records →

Timeline

  1. 2026-10-27 Threatist record created from CVE-2026-104381
  2. 2026-10-27 Alias added: GHSA-3qq2-3hjm-m64g
  3. 2026-10-28 Priority changed: MEDIUM → LOW
  4. 2026-11-04 CISA SSVC decision points changed

References

Advisory 1

  • TI-2022-09698 On WatchGuard Firebox and XTM appliances, an unauthenticated user can execute arbitrary… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-13451 WatchGuard Firebox iked Out of Bounds Write Vulnerability KEVCVSS 4.0CRITICAL 9.3
  • TI-2025-08474 WatchGuard Firebox iked Out of Bounds Write Vulnerability KEVCVSS 4.0CRITICAL 9.3
  • TI-2022-07330 WatchGuard Firebox and XTM appliances allow a remote attacker with unprivileged… KEVCVSS 3.1HIGH 8.8
  • TI-2023-19293 A DLL hijacking vulnerability in Panda Security VPN for Windows prior to version v15.14.8… CVSS 3.1MEDIUM 6.5
  • TI-2015-04587 Watchguard XCS 9.2 and 10.0 before build 150522 allow remote authenticated users to… CVSS 2.0MEDIUM 6.5
See all 203 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences