CVE-2025-6999
WatchGuard Firebox Authentication Portal Request Smuggling Vulnerability
- State
- Published
- Severity
- 6.9 Medium
- Published
- Sep 15, 2025
- Updated
- Aug 10, 2026
- Reserved
- Jul 2, 2025
Description
An HTTP Request Smuggling [CWE-444] vulnerability in the Authentication portal of WatchGuard Fireware OS allows a remote attacker to evade request parameter sanitation and perform a reflected self-Cross-Site Scripting (XSS) attack.
WatchGuard does not believe there is a practical exploit chain with a meaningful security impact for this vulnerability.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N | WatchGuard |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
Fireware OSWatchGuard |
|
References
- https://psirt.watchguard.com/CVE-2025-6999vendor-advisory
- https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00014vendor-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.