CVE-2026-3987

High

Open

TLP:CLEAR

WatchGuard Firebox Arbitrary File Write vis Path Traversal in Fireware Web UI

NVD CVE.org

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Description

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.

Details

CVSS Score: 8.6
EPSS Score ⓘ: 0.64%

47.4th percentile
CVSS Vector: 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
Confidence: 90%
Published: Apr 1, 2026
Last Modified: Aug 10, 2026

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