CVE-2026-40372 CRITICAL

CVE-2026-40372: ASP.NET Core Elevation of Privilege Vulnerability

Vendor Microsoft
Product ASP.NET Core 10.0
Weakness CWE-347
Published April 21, 2026
Last update June 29, 2026
View on NVD All CVEs

CVSS base score

9.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network.

Key dates

02Disclosure timeline

April 21, 2026 CVE published
June 29, 2026 Record updated