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High8.9WatchGuard

High [CVE-2025-4106] WatchGuard Firebox leftover debug code vulnerability

This high-severity WatchGuard advisory covers CVE-2025-4106 affecting Fireware OS.

CVE-2025-4106 Published Oct 24, 2025Updated by vendor Aug 8, 2026
Affected products & platforms
WatchGuardFirebox / Fireware
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Summary

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.

Affected product named by the advisory: Fireware OS.

Affected versions
  • Fireware OS 12.0 before 12.11.3
  • Fireware OS 12.0 before 12.5.13

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Fixed versions
  • 12.11.3
  • 12.5.13

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • 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.

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

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