CVE-2026-45490
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Improper Authorization in .NET Elevation of Privilege

Publication date: 2026-06-09

Last updated on: 2026-06-09

Assigner: Microsoft Corporation

Description
Improper authorization in .NET allows an authorized attacker to elevate privileges locally.
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Meta Information
Published
2026-06-09
Last Modified
2026-06-09
Generated
2026-06-10
AI Q&A
2026-06-09
EPSS Evaluated
N/A
NVD
EUVD
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft .net *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-285 The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.
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Executive Summary

This vulnerability is an improper authorization issue in the .NET framework that allows an authorized attacker to elevate their privileges locally on the affected system.

Impact Analysis

An attacker who already has some level of authorization on the system can exploit this vulnerability to gain higher privileges than intended. This can lead to full control over the affected system, allowing the attacker to compromise confidentiality, integrity, and availability.

Mitigation Strategies

The vulnerability allows an authorized attacker to elevate privileges locally due to improper authorization in .NET.

To mitigate this vulnerability, it is recommended to apply the security updates provided by Microsoft as detailed in their official update guide.

Ensure that only trusted users have local access to systems running affected versions of .NET, and monitor for any unusual privilege escalation attempts.

Compliance Impact

This vulnerability allows an authorized attacker to elevate privileges locally due to improper authorization in .NET.

Such elevation of privilege vulnerabilities can potentially lead to unauthorized access to sensitive data or systems, which may impact compliance with standards and regulations like GDPR and HIPAA that require strict access controls and protection of sensitive information.

However, the provided information does not explicitly describe the direct effects on compliance with these standards.

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