CVE-2026-3343 — WatchGuard Firebox Reflected Cross-Site-Scripting (XSS) Vulnerability in Fireware Web UI

CVE-2026-3343

WatchGuard Firebox Reflected Cross-Site-Scripting (XSS) Vulnerability in Fireware Web UI PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
WatchGuard / Fireware OS	affected 2025.1 before 2026.1.2; affected 12.7 before 12.11.8

CWE

CWE-79

References

https://psirt.watchguard.com/CVE-2026-3343
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00004

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.