HIGH 8.8 Microsoft

CVE-2026-69439

.NET and Visual Studio Elevation of Privilege Vulnerability

Microsoft Security Update 2026-Sep: .NET and Visual Studio Elevation of Privilege Vulnerability

Affected Products

.NET 10.0 installed on Windows
.NET 8.0 installed on Windows
.NET 9.0 installed on Windows
Microsoft Visual Studio 2022 version 17.14
Microsoft Visual Studio 2026 version 18.9
.NET 11.0 installed on Windows

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69439
https://nvd.nist.gov/vuln/detail/CVE-2026-69439

Published: 2026-09-08 · Source: Microsoft · Feed updated: 2026-10-27

This high severity vulnerability with a CVSS score of 8.8 was published on 2026-09-08 via Microsoft. Affected: .NET 10.0 installed on Windows, .NET 8.0 installed on Windows, .NET 9.0 installed on Windows and 3 more.

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