CVE-2026-3987

published 2026-04-01

CVE-2026-3987: A path traversal vulnerability in the Fireware OS Web UI on WatchGuard Firebox systems may allow a privileged authenticated remote attacker to execute…

Priority P3 50 high 7.2 CVSS 3.1

AV N AC L PR H UI N S U C H I H A H

A path traversal vulnerability in the Fireware OS Web UI on WatchGuard Firebox systems may allow a privileged authenticated remote attacker to execute arbitrary code in the context of an elevated system process.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
watchguard	fireware	>= 12.6.1 < 12.12	12.12
watchguard	fireware	>= 2025.1 < 2026.2	2026.2
watchguard	fireware_os	>= 12.6.1 < 12.12	12.12
watchguard	fireware_os	>= 2025.1 < 2026.2	2026.2

CVSS provenance

nvd v3.1 7.2 HIGH CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

nvd v4.0 8.6 HIGH CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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CWE-22