# CVE-2026-70174: Microsoft .NET WPF XPS hyperlink navigation remote code execution

Source: https://junglewise.ai/threats/cve-2026-70174-microsoft-security-advisory-net-and-visual-studio-remote-code  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-13  
License: CC BY 4.0 with a link back

CVE-2026-70174 · Severity: high · CVSS 8.8 · Published 2026-10-13

Windows Presentation Foundation (WPF) in .NET contains a flaw that allows attackers to bypass URI restrictions through malicious XPS hyperlinks. An attacker can craft an XPS document that, when opened by a user, executes arbitrary code on the victim's computer. This affects .NET applications built with vulnerable versions running on Windows.

Technologies: [Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet)](https://junglewise.ai/threats/technologies/microsoft-windowsdesktop-app-runtime-win-arm64), [Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet)](https://junglewise.ai/threats/technologies/microsoft-windowsdesktop-app-runtime-win-x64), [Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet)](https://junglewise.ai/threats/technologies/microsoft-windowsdesktop-app-runtime-win-x86). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft), [NuGet](https://junglewise.ai/threats/vendors/nuget).

## Quick answers

**Is CVE-2026-70174 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-70174 being exploited in the wild.

**How severe is CVE-2026-70174?** High severity, with a CVSS score of 8.8, published 13 October 2026.

**Which products and versions are affected?** Microsoft .NET WindowsDesktop.App.Runtime 8.0.0–8.0.31, 9.0.0–9.0.20, 10.0.0–10.0.12, 11.0.0-preview.1–11.0.0-rc.1; Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet) >= 8.0.0, <= 8.0.31, ECOSYSTEM:introduced=8.0.0,fixed=8.0.32; Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet) >= 8.0.0, <= 8.0.31, ECOSYSTEM:introduced=8.0.0,fixed=8.0.32; Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet) >= 8.0.0, <= 8.0.31, ECOSYSTEM:introduced=8.0.0,fixed=8.0.32.

**Is there a fix for CVE-2026-70174?** Yes. Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet): upgrade to 8.0.32 or later; Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet): upgrade to 8.0.32 or later; Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet): upgrade to 8.0.32 or later. Until then: Update .NET to patched versions (8.0.32, 9.0.21, 10.0.13, or 11.0.0-rc.2 or later). Self-contained applications targeting vulnerable versions must be recompiled and redeployed. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-70174 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-70174?** Check whether you run Microsoft .NET WindowsDesktop.App.Runtime, Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet), Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet): upgrade to 8.0.32 or later

  ```sh
  dotnet add package Microsoft.WindowsDesktop.App.Runtime.win-arm64 --version 8.0.32
  ```

- Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet): upgrade to 8.0.32 or later

  ```sh
  dotnet add package Microsoft.WindowsDesktop.App.Runtime.win-x64 --version 8.0.32
  ```

- Microsoft.WindowsDesktop.App.Runtime.win-x86 (NuGet): upgrade to 8.0.32 or later

  ```sh
  dotnet add package Microsoft.WindowsDesktop.App.Runtime.win-x86 --version 8.0.32
  ```


Update .NET to patched versions (8.0.32, 9.0.21, 10.0.13, or 11.0.0-rc.2 or later). Self-contained applications targeting vulnerable versions must be recompiled and redeployed.

## Technical details

WPF XPS hyperlink navigation fails to properly validate URI restrictions, allowing an attacker to redirect to an attacker-controlled ObjectDataProvider object and achieve remote code execution (CWE-358). The attack requires user interaction to open a malicious document but bypasses URI filtering safeguards. A fix is available in patched .NET runtime versions.

## Affected products

- Microsoft .NET (WindowsDesktop.App.Runtime) 8.0.0–8.0.31, 9.0.0–9.0.20, 10.0.0–10.0.12, 11.0.0-preview.1–11.0.0-rc.1

## Identifiers

- CVE-2026-70174
- GHSA-f749-vhgx-39h6

## Timeline

- 2026-10-13: advisory

## Related threats

- [.NET WindowsDesktop.App.Runtime deserialization remote code execution](https://junglewise.ai/threats/cve-2026-70035-microsoft-security-advisory-net-and-visual-studio-remote-code)
- [Microsoft .NET and Visual Studio WPF heap out-of-bounds write](https://junglewise.ai/threats/cve-2026-70007-microsoft-security-advisory-net-and-visual-studio-remote-code)
- [.NET WPF XPS synthetic hyperlinks remote code execution](https://junglewise.ai/threats/cve-2026-87697-microsoft-security-advisory-net-and-visual-studio-remote-code)
- [Microsoft .NET WindowsDesktop.App.Runtime heap buffer overflow in WPF shader parsing](https://junglewise.ai/threats/cve-2026-96224-microsoft-security-advisory-net-and-visual-studio-remote-code)
- [Microsoft .NET Windows Desktop App Runtime integer overflow in glyph processing](https://junglewise.ai/threats/cve-2026-85363-microsoft-security-advisory-net-and-visual-studio-remote-code)