CVE-2026-40372

Published: Apr 21, 2026

Modified: Jun 1, 2026

PUBLISHED

CVSS v3.1

9.1

CRITICAL

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

Vendor	Product	Versions
Microsoft	ASP.NET Core 10.0	affected `10.0 - < 10.0.7`
Microsoft	Microsoft Visual Studio 2026 version 18.5	affected `18.5.0 - < 18.5.2`

CVSS v3.1 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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

vendor-advisory

patch

Security Training

Train your team to recognize and prevent security threats with our comprehensive security awareness program.

Vulnerability Scanning

Discover vulnerabilities in your applications and infrastructure before attackers do.