CVE-2025-55315 CRITICAL

CVE-2025-55315: ASP.NET Security Feature Bypass Vulnerability

Vendor Microsoft
Product ASP.NET Core 2.3
Weakness CWE-444
Published October 14, 2025
Last update February 22, 2026
View on NVD All CVEs

CVSS base score

9.9/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L/E:U/RL:O/RC:C

What the vulnerability does

01Description

Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an authorized attacker to bypass a security feature over a network.

Key dates

02Disclosure timeline

October 14, 2025 CVE published
February 22, 2026 Record updated