#VU117236 Inconsistent interpretation of HTTP requests in ASP.NET Core and Visual Studio - CVE-2025-55315
Published: October 15, 2025 / Updated: November 14, 2025
Vulnerability identifier: #VU117236
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:L/E:P/U:Green
CVE-ID: CVE-2025-55315
CWE-ID: CWE-444
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerable software:
ASP.NET Core
Visual Studio
ASP.NET Core
Visual Studio
Software vendor:
Microsoft
Microsoft
Description
The vulnerability allows a remote attacker to perform HTTP request smuggling attacks.
The vulnerability exists due to improper validation of HTTP requests in ASP.NET. A remote user 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.
Remediation
Install updates from vendor's website.