CVE-2026-3343
Medium
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.
SeverityMedium
CVSS6.1
Exploit probability—
ProductWatchguard Fireware
PublishedMar 3, 2026
First seenMar 3, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- watchguard fireware12.11.8, 2026.1.2 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| watchguard fireware | 12.7 ≤ v < 12.11.8, 2025.1 ≤ v < 2026.1.2 | 12.11.8, 2026.1.2 |
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