Medium [CVE-2026-3343] WatchGuard Firebox Reflected Cross-Site-Scripting (XSS) Vulnerability in Fireware Web UI
This medium-severity WatchGuard advisory covers CVE-2026-3343 affecting Fireware OS.
Android app · Google Play
Monitor future WatchGuard CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.
Summary
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.
- Fireware OS 2025.1 before 2026.1.2
- Fireware OS 12.7 before 12.11.8
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- 2026.1.2
- 12.11.8
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation
Upgrade to a fixed release: 2026.1.2, 12.11.8. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.