CVE-2026-40372

critical Microsoft
CVSS v3 Base Score
9.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS Score
0.0%
Exploitation probability in 30 days
Top 94% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
High
Availability
None
Published: April 21, 2026 (22 days ago)
Last Modified: April 27, 2026
Vendor: Microsoft
Source: NVD

Description

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

CWE

CWE-347

Affected Products

microsoft asp.net core

References

🔗 msrc.microsoft.com