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.

The EPSS score is 0.00092.

Exploitation none

Automatable no

Technical Impact partial

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.

Package CPE Advisory Released Date
Red Hat Enterprise Linux 10
dotnet8.0-0:8.0.128-1.el10_2 cpe:/o:redhat:enterprise_linux:10.2 RHSA-2026:25111 2026-06-10T00:00:00Z
dotnet9.0-0:9.0.118-1.el10_2 cpe:/o:redhat:enterprise_linux:10.2 RHSA-2026:25112 2026-06-10T00:00:00Z
Red Hat Enterprise Linux 8
dotnet8.0-0:8.0.128-1.el8_10 cpe:/a:redhat:enterprise_linux:8 RHSA-2026:25110 2026-06-10T00:00:00Z
dotnet9.0-0:9.0.118-1.el8_10 cpe:/a:redhat:enterprise_linux:8 RHSA-2026:25113 2026-06-10T00:00:00Z
dotnet10.0-0:10.0.109-1.el8_10 cpe:/a:redhat:enterprise_linux:8 RHSA-2026:25114 2026-06-10T00:00:00Z
Red Hat Hardened Images
dotnet9-0-main-9.0.117-1.hum1 cpe:/a:redhat:hummingbird:1 RHSA-2026:17527 2026-05-14T00:00:00Z

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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 cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-45491 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-45491 cve-icon
History

Thu, 11 Jun 2026 00:15:00 +0000

Type Values Removed Values Added
First Time appeared Redhat
Redhat enterprise Linux
Redhat hummingbird
CPEs cpe:/a:redhat:enterprise_linux:8
cpe:/a:redhat:hummingbird:1
cpe:/o:redhat:enterprise_linux:10.2
Vendors & Products Redhat
Redhat enterprise Linux
Redhat hummingbird
References
Metrics threat_severity

None

 threat_severity

Moderate

Wed, 10 Jun 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

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: 2026-06-10T17:53:34.455Z

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

Link: CVE-2026-45491

cve-icon Vulnrichment

Updated: 2026-06-10T12:17:21.270Z

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

Severity : Moderate

Publid Date: 2026-06-09T17:04:44Z

Links: CVE-2026-45491 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-06-10T11:15:05Z

Weaknesses