CVE-2026-40372

Published Apr 21, 2026

Last updated 4 days ago

Overview

Description
Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network.
Source
secure@microsoft.com
NVD status
Analyzed
Products
asp.net_core

Risk scores

CVSS 3.1

Type
Primary
Base score
9.1
Impact score
5.2
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Severity
CRITICAL

Weaknesses

secure@microsoft.com
CWE-347

Social media

Hype score
Not currently trending

Configurations

References

Sources include official advisories and independent security research.