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Unrated severityNVD Advisory· Published Dec 4, 2025· Updated Dec 5, 2025

WatchGuard Firebox Boot Time System Integrity Check Bypass

CVE-2025-13940

Description

An Expected Behavior Violation [CWE-440] vulnerability in WatchGuard Fireware OS may allow an attacker to bypass the Fireware OS boot time system integrity check and prevent the Firebox from shutting down in the event of a system integrity check failure. The on-demand system integrity check in the Fireware Web UI will correctly show a failed system integrity check message in the event of a failure.This issue affects Fireware OS: from 12.8.1 through 12.11.4, from 2025.1 through 2025.1.2.

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Affected products

2
  • WatchGuard/Firewarellm-fuzzy2 versions
    12.8.1 to 12.11.4, 2025.1 to 2025.1.2+ 1 more
    • (no CPE)range: 12.8.1 to 12.11.4, 2025.1 to 2025.1.2
    • (no CPE)range: 12.8.1

Patches

Vulnerability mechanics

References

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