Executive brief
A security vulnerability has been identified in Windows Presentation Foundation (WPF), a framework used for building Windows desktop applications. An attacker could exploit this flaw to gain higher privileges or execute unauthorized code on a user's computer if the user interacts with a malicious file or application. This could lead to a full system compromise, data theft, or operational disruption.
Technical details
A heap-based buffer overflow (CWE-122) and out-of-bounds write (CWE-787) vulnerability exists in Windows Presentation Foundation (WPF) within the .NET runtime. The flaw is triggered when the application writes data past the end of an intended heap-allocated buffer. An attacker can exploit this locally by convincing a user to open a specially crafted file or run a malicious application, leading to arbitrary code execution with the privileges of the current user. The vulnerability affects .NET 8, 9, and 10 on Windows platforms. Patches are available in .NET versions 8.0.30, 9.0.19, and 10.0.11.
Affected products
- Microsoft Microsoft.WindowsDesktop.App.Runtime.win-arm64 8.0.0 - 8.0.29, 9.0.0 - 9.0.18, 10.0.0 - 10.0.10
- Microsoft Microsoft.WindowsDesktop.App.Runtime.win-x64 8.0.0 - 8.0.29, 9.0.0 - 9.0.18, 10.0.0 - 10.0.10
- Microsoft Microsoft.WindowsDesktop.App.Runtime.win-x86 8.0.0 - 8.0.29, 9.0.0 - 9.0.18, 10.0.0 - 10.0.10
Timeline
- 2026-08-11: advisory
- 2026-08-11: patched