WatchGuard Firebox leftover debug code vulnerability (CVE-2025-4106) | HOL Guard CVE

High · CVSS 8.9CVE-2025-4106

WatchGuard Firebox leftover debug code vulnerability

Answer in brief

CVE-2025-4106 records a High severity (CVSS 8.9) vulnerability in WatchGuard Firebox leftover debug code vulnerability. 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 24, 2025Updated Aug 8, 2026Source checked Sep 22, 2026First seen by HOL Aug 8, 2026Material review Aug 8, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.9
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 8.9. 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
Package	Affected range	Fixed version
WatchGuard/Fireware OSgeneric	>=12.0 <12.11.3	12.11.3
WatchGuard/Fireware OSgeneric	>=12.0 <12.5.13	12.5.13

Recommended response

Check inventory. Check lockfiles and deployed manifests for WatchGuard/Fireware OS, WatchGuard/Fireware OS.
Review the reported fix. Update WatchGuard/Fireware OS to 12.11.3; WatchGuard/Fireware OS to 12.5.13 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 24, 2025
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 8, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 8, 2026

Sources and claim methodology

Upstream source description

An authenticated admin user with access to both the management WebUI and command line interface on a Firebox can enable a diagnostic debug shell by uploading a platform and version-specific diagnostic package and executing a leftover diagnostic command.

Quoted source text, attributed separately from HOL analysis.