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Back to active CVEs
Medium · CVSS 6.0CVE-2026-104381

Fireware OS Missing Authentication in FireCluster State Sync Allows BOVPN Tunnel Denial of ServiceCVE-2026-104381

Answer in brief

CVE-2026-104381 records a Medium severity (CVSS 6.0) vulnerability in Fireware OS Missing Authentication in FireCluster State Sync Allows BOVPN Tunnel Denial of Service. The current sources do not mark it as known exploited. The current feed maps WatchGuard/Fireware OS (generic), WatchGuard/Fireware OS (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 27, 2026Updated Oct 27, 2026Source checked Oct 27, 2026First seen by HOL Oct 27, 2026Material review Oct 27, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.0
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 6.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps WatchGuard/Fireware OS (generic), WatchGuard/Fireware OS (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
WatchGuard/Fireware OSgeneric>=2025.1 <2026.4 || >=12.0 <12.12.42026.4, 12.12.4
WatchGuard/Fireware OSgeneric>=12.0 <12.5.2212.5.22

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for WatchGuard/Fireware OS, WatchGuard/Fireware OS.
  2. 2Review the reported fix. Source-reported solution: Fireware OS 2026.4, Fireware OS 12.12.4, Fireware OS 12.5.22

Evidence timeline and material changes

  1. Published upstream

    Oct 27, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 27, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 27, 2026

Sources and claim methodology

  • Source referencepsirt.watchguard.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Fireware OS Stack Buffer Overflow in Logging Service Allows Remote Code ExecutionSame watchguard/fireware os package
  • Fireware OS Stack Buffer Overflow in WireGuard Configuration Allows Remote Code ExecutionSame watchguard/fireware os package
  • Fireware OS NULL Pointer Dereference in Management Interface Allows Unauthenticated Denial of ServiceSame watchguard/fireware os package
  • Fireware OS Heap Buffer Overflow in AD Authentication Service Allows Pre-Authentication Remote Code ExecutionSame watchguard/fireware os package
  • Fireware OS Heap Buffer Overflow in AD Authentication Service Allows Pre-Authentication Remote Code ExecutionSame watchguard/fireware os package
  • Fireware OS Stack Buffer Overflow in VPN Network Access Enforcement Allows Unprivileged Code ExecutionSame watchguard/fireware os package

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-294, CWE-306, CWE-345
Source
CVE List V5
Source checked
Oct 27, 2026
References
1 linked source
Open source record