CVE-2026-3987CWE-22path-traversal

CVE-2026-3987

High · published April 2, 2026

CVSS v3.1
7.2
EPSS
1%
Percentile
64.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01057 · 64.2th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-04-02T02:16Z
Affected products (2)
ProductVersionsFixed in
watchguard/fireware≥ 2025.1, < 2026.22026.2
watchguard/fireware≥ 12.6.1, < 12.1212.12
References (2)
https://psirt.watchguard.com/CVE-2026-3987 · 5d1c2695-1a31-4499-88ae-e847036fd7e3https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00009 · 5d1c2695-1a31-4499-88ae-e847036fd7e3
EPSS history
Timeline
  • 01 APR 21:32Z
    WatchGuard Firebox Arbitrary File Write vis Path Traversal in Fireware Web UI
    cvelistv5