CVE-2026-45491
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Improper Link Resolution in .NET Allows Local Tampering

Publication date: 2026-06-09

Last updated on: 2026-06-09

Assigner: Microsoft Corporation

Description
Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering 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
CVE-2026-45491
EUVD
EUVD-2026-35675
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-59 The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
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Executive Summary

This vulnerability involves improper link resolution before file access, also known as 'link following', in the .NET framework. It allows an unauthorized attacker to perform tampering on the local system.

Impact Analysis

The vulnerability can lead to tampering by an unauthorized attacker on the local system. This means an attacker could modify files or data without permission, potentially compromising the integrity of the affected system.

Compliance Impact

The provided information does not specify how this vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

Mitigation Strategies

The vulnerability involves improper link resolution before file access in .NET, allowing local tampering by unauthorized attackers.

To mitigate this vulnerability, ensure that your .NET environment is updated with the latest security patches provided by Microsoft.

Restrict local access to trusted users only, as the attack requires local access.

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