Summary
Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
What privileges could be gained by an attacker who successfully exploited the vulnerability?
The attacker would gain the rights of the user that is running the affected application.
According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?
Successful exploitation of this vulnerability requires an attacker to win a race condition.
Security updates
8.0.428 — https://support.microsoft.com/help/5135243
9.0.321 — https://support.microsoft.com/help/5135242
10.0.404 — https://support.microsoft.com/help/5135241
11.0.100 — https://github.com/dotnet/core/blob/main/release-notes/11.0/11.0.0/11.0.0.md
17.14.45 — https://learn.microsoft.com/en-us/visualstudio/releases/2022/release-notes-v17.14
18.11.4 — https://learn.microsoft.com/en-us/visualstudio/releases/2026/release-notes-v18.11
18.12.0 — https://learn.microsoft.com/en-us/visualstudio/releases/2026/release-notes
18.11.1 — https://github.com/microsoft/vstest/security/advisories/GHSA-6856-87hx-p5x7
Vulnerabilities 1
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High 7.5
.NET Elevation of Privilege Vulnerability
Improper access control in .NET allows an authorized attacker to elevate privileges locally.
Revision history
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#2
Changes made to the security updates links and information. This is an informational change only.
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#1
Information published.
References
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CVE-2026-105544 .NET Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105544
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss