CVE-2026-13053

WatchGuard Firebox Authenticated Out of Bounds Write in Management CLI Command Handler

State: Published
Severity: 8.6 High
Published: Jul 2, 2026
Updated: Aug 27, 2026
Reserved: Jun 23, 2026

Description

An Out-of-bounds Write vulnerability in WatchGuard Fireware OS's CLI could allow an authenticated privileged user to execute arbitrary code via a specially crafted CLI command.

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

Affected Products

Product	Versions
Fireware OSWatchGuard	2025.1 to before 2026.2.1Affected 12.0 to before 12.12.1Affected 11.0 and laterAffected
Fireware OSWatchGuard	12.0 to before 12.11.9Affected
Fireware OSWatchGuard	12.0 to before 12.5.19Affected

References

https://psirt.watchguard.com/CVE-2026-13053vendor-advisory
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00030vendor-advisory

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