CVE-2026-69439: Microsoft Security Advisory CVE-2026-69439 – .NET and Visual Studio Elevation of Privilege Vulnerability

September 9, 2026

Microsoft is releasing this security advisory to provide information about a vulnerability in Microsoft.DiaSymReader.Native. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

An out of bounds write can occur when parsing a Portable PDB file.

References

github.com/advisories/GHSA-527h-q9f6-p7qx
github.com/dotnet/runtime/security/advisories/GHSA-527h-q9f6-p7qx
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69439
nvd.nist.gov/vuln/detail/CVE-2026-69439
nvd.nist.gov/vuln/detail/cve-2026-69439

Code Behaviors & Features

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