CVE-2026-40372
ASP.NET Core Elevation of Privilege Vulnerability
CVSS Score
9.1
EPSS Score
11.2%
EPSS Percentile
95th
Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network.
| Vendor | microsoft |
| Product | asp.net core 10.0 |
| Ecosystems | |
| Industries | TechnologyEnterprise |
| Published | Apr 21, 2026 |
| Last Updated | Jul 15, 2026 |
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CVSS v3 Breakdown
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
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Microsoft / ASP.NET Core 10.0
10.0 < 10.0.7
Microsoft / Microsoft Visual Studio 2026 version 18.5
18.5.0 < 18.5.2
References
msrc.microsoft.com: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40372 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-40372 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2460224 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40372.json