CVE-2026-40372

CRITICAL

ASP.NET Core Elevation of Privilege Vulnerability

Title source: cna
STIX 2.1

Description

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

References (1)

Scores

CVSS v3 9.1
EPSS 0.0002
EPSS Percentile 6.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-347
Status published
Products (4)
Microsoft/ASP.NET Core 10.0 10.0 - 10.0.7
microsoft/asp.net_core 10.0.0 - 10.0.7
Microsoft/Microsoft Visual Studio 2026 version 18.5 18.5.0 - 18.5.2
nuget/Microsoft.AspNetCore.DataProtection 10.0.0 - 10.0.7NuGet
Published Apr 21, 2026
Tracked Since Apr 22, 2026