CVE-2026-13722

WatchGuard Firebox Firmware Image Validation Bypass in WatchGuard Fireware OS

State: Published
Severity: 8.6 High
Published: Jul 2, 2026
Updated: Aug 27, 2026
Reserved: Jun 29, 2026

Description

WatchGuard Fireware OS contains a firmware validation bypass when processing a backup image via the backup/restore feature. An authenticated administrator can exploit this vulnerability to install a tampered firmware image.

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-347

Affected Products

Product	Versions
Fireware OSWatchGuard	2025.1 to before 2026.2.1Affected 12.0 to before 12.12.1Affected 11.0 through 11.12.4+541730Affected
Fireware OSWatchGuard	12.0 to before 12.11.9Affected
Fireware OSWatchGuard	12.0 and laterAffected

References

https://psirt.watchguard.com/CVE-2026-13722vendor-advisory
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00022vendor-advisory

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