{"id":"CVE-2026-90464","title":"Fireware OS Missing Command Validation allows Authenticated Arbitrary File Modification as Root","summary":"An external control of file path vulnerability in a WatchGuard Fireware OS firewall diagnostic command allows a remote, authenticated attacker with at least read-only (Device Monitor) privileges and access to the management CLI to create…","severity":"high","cvss":7.2,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","cvssSource":"cna","cwe":["CWE-59","CWE-73","CWE-732"],"vendor":"WatchGuard","product":"Fireware OS","affected":["fireware_os >= 2025.1 < 2026.4","fireware_os >= 12.0 < 12.12.4","fireware_os >= 12.0 < 12.5.22"],"published":"2026-10-27","updated":"2026-10-27","sourceUpdated":"2026-10-27T15:52:28.267Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90464","references":[{"url":"https://psirt.watchguard.com/CVE-2026-90464"}],"tags":["cve.org"],"ingestedAt":"2026-10-27T16:11:59.480Z","slug":"CVE-2026-90464","body":"## Overview\n\nAn external control of file path vulnerability in a WatchGuard Fireware OS firewall diagnostic command allows a remote, authenticated attacker with at least read-only (Device Monitor) privileges and access to the management CLI to create, truncate, or overwrite arbitrary files and modify kernel parameters with root privileges by submitting a specially crafted command. Written content is limited to numeric values.\n\n## Affected\n\n- `fireware_os >= 2025.1 < 2026.4`\n- `fireware_os >= 12.0 < 12.12.4`\n- `fireware_os >= 12.0 < 12.5.22`\n\n## Remediation\n\nFireware OS 2026.4, Fireware OS 12.12.4, Fireware OS 12.5.22","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":39.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}