Inconsistent interpretation of HTTP requests in Fireware OS - CVE-2025-6999

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Main Vulnerability Database Vulnerabilities #VU112910

Inconsistent interpretation of HTTP requests in Fireware OS - CVE-2025-6999

Published: July 15, 2025


Vulnerability identifier: #VU112910
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-6999
CWE-ID: CWE-444
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: WatchGuard
Affected software:
Fireware OS

Detailed vulnerability description

The vulnerability allows a remote attacker to perform HTTP request smuggling attacks.

The vulnerability exists due to improper validation of HTTP requests in the Authentication portal. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.

Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.


How to mitigate CVE-2025-6999

Install updates from vendor's website.

Sources