Jun 2026: .NET Tampering Vulnerability
CVE-2026-45491 Published on June 9, 2026

.NET Tampering Vulnerability
Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally.

Vendor Advisory NVD

Weakness Type

What is an insecure temporary file Vulnerability?

The software 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.

CVE-2026-45491 has been classified to as an insecure temporary file vulnerability or weakness.

Products Associated with CVE-2026-45491

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Microsoft Net

Affected Versions

Microsoft .NET 10.0:

Version 10.0.0 and below 10.0.9 is affected.

Microsoft .NET 8.0:

Version 8.0 and below 8.0.28 is affected.