CVE-2025-13940

MEDIUM
Published Dec 4, 2025 Modified Dec 10, 2025 CWE-440

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.

CVSS v3.1 Score

5.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Weakness Type (CWE)

CWE-440 CWE-440

Affected Products

Vendor Product
watchguard fireware
watchguard firebox_t115-w
watchguard firebox_t125
watchguard firebox_t125-w
watchguard firebox_t145
watchguard firebox_t145-w
watchguard firebox_t185
watchguard fireware
watchguard firebox_m270
watchguard firebox_m290
watchguard firebox_m370
watchguard firebox_m390
watchguard firebox_m440
watchguard firebox_m4600
watchguard firebox_m470
watchguard firebox_m4800
watchguard firebox_m5600
watchguard firebox_m570
watchguard firebox_m5800
watchguard firebox_m590
watchguard firebox_m670
watchguard firebox_m690
watchguard firebox_nv5
watchguard firebox_t20
watchguard firebox_t25
watchguard firebox_t40
watchguard firebox_t45
watchguard firebox_t55
watchguard firebox_t70
watchguard firebox_t80
watchguard firebox_t85
watchguard fireboxcloud
watchguard fireboxv

References

Frequently Asked Questions

What is CVE-2025-13940? +
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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).
How severe is CVE-2025-13940? +
CVE-2025-13940 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2025-13940? +
CVE-2025-13940 affects products from watchguard, specifically: firebox_m270, firebox_m290, firebox_m370, firebox_m390, firebox_m440, firebox_m4600, firebox_m470, firebox_m4800, firebox_m5600, firebox_m570, firebox_m5800, firebox_m590, firebox_m670, firebox_m690, firebox_nv5, firebox_t115-w, firebox_t125, firebox_t125-w, firebox_t145, firebox_t145-w, firebox_t185, firebox_t20, firebox_t25, firebox_t40, firebox_t45, firebox_t55, firebox_t70, firebox_t80, firebox_t85, fireboxcloud, fireboxv, fireware. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2025-13940? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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