# CVE-2025-13940

## Summary

- **CVE ID:** CVE-2025-13940
- **Severity:** MEDIUM
- **CVSS Score:** 6.7 (CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-440, CWE-440
- **Published:** Dec 4, 2025
- **Last Modified:** Aug 10, 2026

## 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.

## Affected Products

- WatchGuard — Fireware OS (12.8.1)
- WatchGuard — Fireware OS (2025.1)

## References

- [CNA](https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00026)
- [CNA](https://psirt.watchguard.com/CVE-2025-13940)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.13%
- **EPSS Percentile:** 2.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._