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

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Microsoft .NET 10.0 affected
Version Status Constraints
10.0.0 affected < 10.0.9
Microsoft .NET 8.0 affected
Version Status Constraints
8.0 affected < 8.0.28
Microsoft .NET 8.0 affected
Version Status Constraints
8.0.0 affected < 8.0.28
Microsoft .NET 9.0 affected
Version Status Constraints
9.0.0 affected < 9.0.17

No data.

No data.

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No data.

Project Subscriptions

Vendors Products
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45491 cve-icon cve-icon
History

Tue, 09 Jun 2026 17:15:00 +0000

Type Values Removed Values Added
Description Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally.
Title .NET Tampering Vulnerability
First Time appeared Microsoft
Microsoft .net
Weaknesses CWE-59
CPEs cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft .net
References
Metrics cvssV3_1

{'score': 6.2, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-06-09T17:48:27.809Z

Reserved: 2026-05-12T16:07:22.618Z

Link: CVE-2026-45491

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-06-09T17:17:25.567

Modified: 2026-06-09T19:32:51.440

Link: CVE-2026-45491

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-09T19:15:12Z

Weaknesses