What is CVE-2025-13940?

CVE-2025-13940 is a medium-severity vulnerability in Watchguard Fireboxcloud, classified under Expected Behavior Violation. CVSS score: 5.5/10. Published 2025-12-04.

How severe is CVE-2025-13940?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Watchguard Fireboxcloud

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…

EPSS: 0.001 (1.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Affected products

Watchguard Fireboxcloud
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

Weakness classification (CWE)

CWE-440 — Expected Behavior Violation

References

5d1c2695-1a31-4499-88ae-e847036fd7e3 (Vendor Advisory)

Frequently asked questions

What is CVE-2025-13940?: CVE-2025-13940 is a medium-severity vulnerability in Watchguard Fireboxcloud, classified under Expected Behavior Violation. CVSS score: 5.5/10. Published 2025-12-04.
How severe is CVE-2025-13940?: Medium severity. CVSS v3 base score is 5.5 out of 10.