CVE-2026-3343
Reflected XSS in Fireware OS Web UI Enables Script Execution
Publication date: 2026-03-03
Last updated on: 2026-03-04
Assigner: WatchGuard Technologies, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| watchguard | fireware | From 12.7 (inc) to 12.11.8 (exc) |
| watchguard | fireware | From 2025.1 (inc) to 2026.1.2 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a reflected cross-site scripting (XSS) issue in the Fireware OS Web UI. It allows malicious JavaScript code to be executed in the browser of an authenticated management user when they click on a specially crafted link.
How can this vulnerability impact me? :
The vulnerability can lead to the execution of malicious scripts in the context of an authenticated user's browser. This can result in unauthorized actions being performed on behalf of the user, theft of sensitive information, session hijacking, or other malicious activities that compromise the security of the management interface.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know