{"id":"CVE-2026-93864","title":"Fireware OS Link Following in firewalld Allows Local Arbitrary File Overwrite as Root","summary":"A link following vulnerability in WatchGuard Fireware OS’s firewall daemon allows a local attacker with code execution as a low-privileged system process to overwrite arbitrary files with root privileges, and to tamper with firewall IP s…","severity":"high","cvss":7.1,"cvssVector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H","cvssSource":"cna","cwe":["CWE-22","CWE-377","CWE-59","CWE-73"],"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":"2026-10-27T15:52:27.765Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93864","references":[{"url":"https://psirt.watchguard.com/CVE-2026-93864"}],"tags":["cve.org"],"ingestedAt":"2026-10-27T16:11:59.473Z","slug":"CVE-2026-93864","body":"## Overview\n\nA link following vulnerability in WatchGuard Fireware OS’s firewall daemon allows a local attacker with code execution as a low-privileged system process to overwrite arbitrary files with root privileges, and to tamper with firewall IP set data, by planting a crafted file system object and triggering a list update. Written content is partially constrained.\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":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}