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CVE-2026-85363

Microsoft Security Advisory CVE-2026-85363 - .NET and Visual Studio Remote Code Execution Vulnerability

Published Oct 13, 2026 · updated Oct 13, 2026 · Microsoft .NET 10.0

## 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. Attacker-controlled XPS glyph coordinates can overflow destination pointer arithmetic in , causing an out-of-bounds write and process termination. ## Announcement Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/469 ## CVSS Details - **Version:** 3.1 - **Severity:** High - **Score:** 8.8 - **Vector:** - **Weakness:** CWE-190 (Integer Overflow or Wraparound) ## 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) | >= 8.0.0, = 8.0.0, = 8.0.0, = 10.0.0, = 10.0.0, = 10.0.0, = 9.0.0, = 9.0.0, = 9.0.0, = 11.0.0-preview.1, = 11.0.0-preview.1, = 11.0.0-preview.1, 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.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 13, 2026 · Catalog

    Detected

    ## 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. Attacker-controlled XPS glyph coordinates can overflow destination pointer arithmetic in , causing an out-of-bounds wri

  2. Oct 13, 2026 · Catalog

    Fix available

    NuGet Microsoft.WindowsDesktop.App.Runtime.win-arm64 8.0.0 → 8.0.32

  3. Oct 13, 2026 · Catalog

    Fix available

    NuGet Microsoft.WindowsDesktop.App.Runtime.win-x64 8.0.0 → 8.0.32

  4. Oct 13, 2026 · Catalog

    Fix available

    NuGet Microsoft.WindowsDesktop.App.Runtime.win-x86 8.0.0 → 8.0.32

  5. Oct 13, 2026 · Catalog

    Fix available

    NuGet Microsoft.WindowsDesktop.App.Runtime.win-arm64 10.0.0 → 10.0.13

  6. Oct 13, 2026 · Catalog

    Fix available

    NuGet Microsoft.WindowsDesktop.App.Runtime.win-x64 10.0.0 → 10.0.13

  7. Oct 13, 2026 · Catalog

    Fix available

    NuGet Microsoft.WindowsDesktop.App.Runtime.win-x86 10.0.0 → 10.0.13

  8. Oct 13, 2026 · Catalog

    Fix available

    NuGet Microsoft.WindowsDesktop.App.Runtime.win-arm64 9.0.0 → 9.0.21

  9. Oct 13, 2026 · Catalog

    Fix available

    NuGet Microsoft.WindowsDesktop.App.Runtime.win-x64 9.0.0 → 9.0.21

  10. Oct 13, 2026 · Catalog

    Fix available

    NuGet Microsoft.WindowsDesktop.App.Runtime.win-x86 9.0.0 → 9.0.21

  11. Oct 13, 2026 · Catalog

    Fix available

    NuGet Microsoft.WindowsDesktop.App.Runtime.win-arm64 11.0.0-preview.1 → 11.0.0-rc.2

  12. Oct 13, 2026 · Catalog

    Fix available

    NuGet Microsoft.WindowsDesktop.App.Runtime.win-x64 11.0.0-preview.1 → 11.0.0-rc.2

  13. Oct 13, 2026 · Catalog

    Fix available

    NuGet Microsoft.WindowsDesktop.App.Runtime.win-x86 11.0.0-preview.1 → 11.0.0-rc.2

  14. Oct 13, 2026 · Catalog

    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. Attacker-controlled XPS glyph coordinates can overflow destination pointer arithmetic in , causing an out-of-bounds wri

Affected

  • NuGet Microsoft.WindowsDesktop.App.Runtime.win-arm6410.0.0 → 10.0.13
  • NuGet Microsoft.WindowsDesktop.App.Runtime.win-arm6411.0.0-preview.1 → 11.0.0-rc.2
  • NuGet Microsoft.WindowsDesktop.App.Runtime.win-arm648.0.0 → 8.0.32
  • NuGet Microsoft.WindowsDesktop.App.Runtime.win-arm649.0.0 → 9.0.21
  • NuGet Microsoft.WindowsDesktop.App.Runtime.win-x6410.0.0 → 10.0.13
  • NuGet Microsoft.WindowsDesktop.App.Runtime.win-x6411.0.0-preview.1 → 11.0.0-rc.2
  • NuGet Microsoft.WindowsDesktop.App.Runtime.win-x648.0.0 → 8.0.32
  • NuGet Microsoft.WindowsDesktop.App.Runtime.win-x649.0.0 → 9.0.21
  • NuGet Microsoft.WindowsDesktop.App.Runtime.win-x8610.0.0 → 10.0.13
  • NuGet Microsoft.WindowsDesktop.App.Runtime.win-x8611.0.0-preview.1 → 11.0.0-rc.2
  • NuGet Microsoft.WindowsDesktop.App.Runtime.win-x868.0.0 → 8.0.32
  • NuGet Microsoft.WindowsDesktop.App.Runtime.win-x869.0.0 → 9.0.21
  • vendor Microsoft .NET 10.0version unspecified

Sources

  • CVE.orgCVE-2026-85363

    Integer overflow or wraparound in .NET Framework allows an unauthorized attacker to elevate privileges over a network.

    cve.org
  • GitHub Advisory DatabaseGHSA-f63g-mx39-3r38

    GitHub Advisory Database record mirrored by OSV.

    github.com
  • OSV.devGHSA-f63g-mx39-3r38

    Microsoft Security Advisory CVE-2026-85363 - .NET and Visual Studio Remote Code Execution Vulnerability

    osv.dev

References