{"id":"CVE-2025-13940","title":"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 integri…","summary":"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 integri…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","cwe":["CWE-440"],"vendor":"watchguard","product":"fireware","affected":["fireware >= 2025.1, < 2025.1.3","fireware >= 12.8.1, < 12.11.5"],"patched":["fireware 12.11.5"],"published":"2025-12-04","updated":"2026-09-25","sourceUpdated":"2026-09-25T23:10:00.463","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-13940","references":[{"url":"https://psirt.watchguard.com/CVE-2025-13940","label":"5d1c2695-1a31-4499-88ae-e847036fd7e3"},{"url":"https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00026","label":"5d1c2695-1a31-4499-88ae-e847036fd7e3"}],"tags":["nvd"],"epss":0.00125,"epssPercentile":0.01894,"ingestedAt":"2026-09-25T23:21:16.882Z","slug":"CVE-2025-13940","body":"## Overview\n\nAn 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.\n\n## Affected\n\n- `fireware >= 2025.1, < 2025.1.3`\n- `fireware >= 12.8.1, < 12.11.5`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `fireware 12.11.5`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}