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CVE-2026-70007

Microsoft Security Advisory CVE-2026-70007 - .NET and Visual Studio Remote Code Execution Vulnerability

Published Oct 13, 2026 · updated Oct 13, 2026

## Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in Microsoft.WindowsDesktop.App.Runtime (WPF). This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. Crafted WPF pixel-shader bytecode can desynchronize the two parsing passes in , causing heap out-of-bounds writes or reads. ## Announcement Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/450 ## CVSS Details - **Version:** 3.1 - **Severity:** High - **Score:** 8.8 - **Vector:** - **Weakness:** CWE-787 (Out-of-bounds Write) ## Affected Platforms - **Platforms:** Windows - **Architectures:** All ## Affected Packages The vulnerability affects Microsoft .NET projects that use an affected package version listed below. Package name | Affected version | Patched version ------------ | ---------------- | --------------- [Microsoft.WindowsDesktop.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.WindowsDesktop.App.Runtime.win-arm64) | >= 9.0.0, = 9.0.0, = 9.0.0, = 11.0.0-preview.1, = 11.0.0-preview.1, = 11.0.0-preview.1, = 10.0.0, = 10.0.0, = 10.0.0, = 8.0.0, = 8.0.0, = 8.0.0, How do I know if I am affected? If using a package listed in [affected packages](#affected-packages), you're exposed to the vulnerability. ### How do I fix the issue? 1. To fix the issue please install the latest version of .NET. If you have installed one or more .NET SDKs through Visual Studio, Visual Studio will prompt you to update Visual Studio, which will also update your .NET SDKs. 2. If your application references the vulnerable package, update the package reference to the patched version. You can list the versions you have installed by running the command. Once you have installed the updated runtime or SDK, restart your apps for the update to take effect. Additionally, if you've deployed [self-contained applications](https://docs.microsoft.com/dotnet/core/deployin

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 13, 2026 · GitLab Advisory Database

    Detected

    Microsoft is releasing this security advisory to provide information about a vulnerability in Microsoft.WindowsDesktop.App.Runtime (WPF). This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. Crafted WPF pixel-shader bytecode can desynchronize the two parsing passes in CPSTrans::Initialize, causing heap out-of-bounds writes or rea

  2. Oct 13, 2026 · GitHub Advisory Database

    Updated

    ## Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in Microsoft.WindowsDesktop.App.Runtime (WPF). This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. Crafted WPF pixel-shader bytecode can desynchronize the two parsing passes in , causing heap out-of-bounds writes or re

Affected

  • nuget Microsoft.WindowsDesktop.App.Runtime.win-arm64>= 10.0.0, <= 10.0.12
  • nuget Microsoft.WindowsDesktop.App.Runtime.win-arm64>= 11.0.0-preview.1, <= 11.0.0-rc.1
  • nuget Microsoft.WindowsDesktop.App.Runtime.win-arm64>= 8.0.0, <= 8.0.31
  • nuget Microsoft.WindowsDesktop.App.Runtime.win-arm64>= 9.0.0, <= 9.0.20
  • nuget Microsoft.WindowsDesktop.App.Runtime.win-x64>= 10.0.0, <= 10.0.12
  • nuget Microsoft.WindowsDesktop.App.Runtime.win-x64>= 11.0.0-preview.1, <= 11.0.0-rc.1
  • nuget Microsoft.WindowsDesktop.App.Runtime.win-x64>= 8.0.0, <= 8.0.31
  • nuget Microsoft.WindowsDesktop.App.Runtime.win-x64>= 9.0.0, <= 9.0.20
  • nuget Microsoft.WindowsDesktop.App.Runtime.win-x86>= 10.0.0, <= 10.0.12
  • nuget Microsoft.WindowsDesktop.App.Runtime.win-x86>= 11.0.0-preview.1, <= 11.0.0-rc.1
  • nuget Microsoft.WindowsDesktop.App.Runtime.win-x86>= 8.0.0, <= 8.0.31
  • nuget Microsoft.WindowsDesktop.App.Runtime.win-x86>= 9.0.0, <= 9.0.20
  • nuget microsoft.windowsdesktop.app.runtime.win-arm64version unspecified
  • nuget microsoft.windowsdesktop.app.runtime.win-x64version unspecified
  • nuget microsoft.windowsdesktop.app.runtime.win-x86version unspecified

Sources

  • CVE.orgVulnerability recordCVE-2026-70007

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-70007

    30-day exploitation probability 0.6%

    first.org
  • GitHub Advisory DatabasePackage advisoryGHSA-pfwj-2f93-rf42

    Microsoft Security Advisory CVE-2026-70007 - .NET and Visual Studio Remote Code Execution Vulnerability

    github.com
  • GitLab Advisory DatabasePackage advisoryCVE-2026-70007

    Microsoft is releasing this security advisory to provide information about a vulnerability in Microsoft.WindowsDesktop.App.Runtime (WPF). This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. Crafted WPF pixel-shader bytecode can desynchronize the two parsing passes in CPSTrans::Initialize, causing heap out-of-bounds writes or rea

    advisories.gitlab.com

References