CVE-2026-3342CWE-787

WatchGuard Firebox Out of Bounds Write Vulnerability

High · published March 3, 2026

CVSS v4.0
8.6
EPSS
1%
Percentile
53.3
In the wild
Unconfirmed
What it is

An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow an authenticated privileged administrator to execute arbitrary code with root permissions via an exposed management interface.

This vulnerability affects Fireware OS 11.9 up to and including 11.12.4_Update1, 12.0 up to and including 12.11.7 and 2025.1 up to and including 2026.1.1.

The record
Technical detail
CVSS v4.0
8.6 · HIGH
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
EPSS
0.00717 · 53.3th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-03-03T13:17Z
EPSS history
Timeline
  • 03 MAR 13:17Z
    WatchGuard Firebox Out of Bounds Write Vulnerability
    cvelistv5