CVE-2026-62886: Microsoft Security Advisory CVE-2026-62886 – .NET Elevation of Privilege Vulnerability

August 11, 2026

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

An integer overflow or wraparound in .NET allows an unauthorized attacker to elevate privileges locally.

References

github.com/advisories/GHSA-jqhp-238x-qhgf
github.com/dotnet/announcements/issues/430
github.com/dotnet/wpf/security/advisories/GHSA-jqhp-238x-qhgf
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62886
nvd.nist.gov/vuln/detail/CVE-2026-62886

Code Behaviors & Features

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