CVE-2026-40372
Received Received - Intake
Cryptographic Signature Bypass in ASP.NET Core Enables Privilege Escalation

Publication date: 2026-04-21

Last updated on: 2026-04-27

Assigner: Microsoft Corporation

Description
Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network.
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Meta Information
Published
2026-04-21
Last Modified
2026-04-27
Generated
2026-06-16
AI Q&A
2026-04-21
EPSS Evaluated
2026-06-15
NVD
CVE-2026-40372
EUVD
EUVD-2026-24249
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft asp.net_core From 10.0.0 (inc) to 10.0.7 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-347 The product does not verify, or incorrectly verifies, the cryptographic signature for data.
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Executive Summary

This vulnerability involves improper verification of a cryptographic signature in ASP.NET Core. Because of this flaw, an unauthorized attacker can exploit the issue over a network to elevate their privileges.

Impact Analysis

The impact of this vulnerability is that an attacker can gain elevated privileges without authorization. This means they could potentially perform actions or access resources that should be restricted, leading to serious security risks.

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