Medium 6.7Published Dec 4, 2025

CVE-2025-13940WatchGuard Firebox Boot Time System Integrity Check Bypass

Updated under an hour ago (Oct 28, 2026, 3:10 PM ET)

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It affects WatchGuard Fireware OS and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for WatchGuard Fireware OS

Exploited in the last 30 days

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.

CVSS: 6.7 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-440
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: WatchGuard
NVD analysis: Modified
Record last updated: Aug 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

WatchGuard Fireware OS watchguard:fireware_os (from the name)	from 2025.1 before 2025.1.3; from 12.8.1 before 12.11.5	CNA record
watchguard fireware watchguard:fireware	from 2025.1 before 2025.1.3; from 12.8.1 before 12.11.5	NVD

References

References

https://psirt.watchguard.com/CVE-2025-13940	vendor-advisory
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00026	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.