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 this vulnerability?
An attacker who successfully exploited this vulnerability could gain the privileges of the user account or service account running the affected process.
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 and also to take additional actions prior to exploitation to prepare the target environment.
Security updates
18.10.4 — https://learn.microsoft.com/en-us/visualstudio/releases/2026/release-notes
17.14.42 — https://learn.microsoft.com/en-us/visualstudio/releases/2022/release-notes
9.0.319, 9.0.122 — https://support.microsoft.com/help/5130035
10.0.402 — https://support.microsoft.com/help/5130036
11.0.100-rc.2 — https://github.com/dotnet/announcements/issues/455
Vulnerabilities 1
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Medium 6.7
.NET Elevation of Privilege Vulnerability
Improper link resolution before file access ('link following') in .NET allows an authorized attacker to elevate privileges locally.
Revision history
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#2
Updated the Security Updates table to add KB article links for .NET 11.0 and download and KB article links for Microsoft Visual Studio. This is an informational change only; the fixed builds are unchanged.
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#1
Information published.
References
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CVE-2026-70165 .NET Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70165
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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