CVE-2026-3342

WatchGuard Firebox Out of Bounds Write Vulnerability

State: Published
Severity: 8.6 High
Published: Mar 3, 2026
Updated: Mar 4, 2026
Reserved: Feb 27, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	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	WatchGuard

Weaknesses

CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
Fireware OSWatchGuard	11.9 through 11.12.4+541730Affected 12.0 through 12.11.7Affected 12.5 through 12.5.16Affected 2025.1 through 2026.1.1Affected

References

https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00003

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