CVE-2026-3343

Published: Mar 3, 2026

Modified: Mar 4, 2026

PUBLISHED

Description

A reflected cross-site scripting (XSS) vulnerability in the Fireware OS Web UI enabled execution of malicious JavaScript in the context of an authenticated management user's browser when they click on a specially crafted link. This vulnerability affects Fireware OS 12.7 up to and including 12.11.7 and 2025.1 up to and including 2026.1.1.

Vendor	Product	Versions
WatchGuard	Fireware OS	affected `12.7 - <= 12.11.7` affected `2025.1 - <= 2026.1.1`

Weaknesses (CWE)

CWE-79

References

https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00004

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CVE-2026-3343

Description

Affected Products

Weaknesses (CWE)

References