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CVE-2026-96234 · GHSA-fq6x-pvr9-888r

Microsoft Security Advisory CVE-2026-96234 - .NET and Visual Studio Information Disclosure Vulnerability

Risk score
46/100
CVSS
5.3 v3.1
Exploit chance (30 days)
0.3%
Published
13 Oct 2026

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What to know

What it is
Origin validation error in .NET allows an unauthorized attacker to disclose information over a network.
Affected
Microsoft.WindowsDesktop.App.Runtime.win-arm64 (nuget) >= 9.0.0, <= 9.0.20; Microsoft.WindowsDesktop.App.Runtime.win-x64 (nuget) >= 9.0.0, <= 9.0.20; Microsoft.WindowsDesktop.App.Runtime.win-x86 (nuget) >= 9.0.0, <= 9.0.20; Microsoft.WindowsDesktop.App.Runtime.win-arm64 (nuget) >= 10.0.0, <= 10.0.12
Fix
Upgrade Microsoft.WindowsDesktop.App.Runtime.win-arm64 to 9.0.21 or 10.0.13 or 8.0.32; Microsoft.WindowsDesktop.App.Runtime.win-x64 to 9.0.21 or 10.0.13 or 8.0.32; Microsoft.WindowsDesktop.App.Runtime.win-x86 to 9.0.21 or 10.0.13 (whichever matches your release line) or later.
Exploitation
No known exploitation

Story map

Story map: Microsoft.WindowsDesktop.App.Runtime.win-arm64THE FLAWSTHE FIXCVE-2026-96234Microsoft Security AdvisoryCVE-2026-96234 - .NET andVisual Studio Information…CVSS 5.3 · EPSS 0%CVE-2026-70035Microsoft Security AdvisoryCVE-2026-70035 - .NET andVisual Studio Remote Code…CVSS 8.8 · EPSS 1%CVE-2026-83520Microsoft Security AdvisoryCVE-2026-83520 - .NET andVisual Studio Remote Code…CVSS 8.8 · EPSS 1%CVE-2026-87697Microsoft Security AdvisoryCVE-2026-87697 - .NET andVisual Studio Remote Code…CVSS 8.8 · EPSS 1%FixUpgradeMicrosoft.WindowsDesktop.App.Runtime.win-arm64 to 10.0.13or 8.0.32 or 9.0.21…Who is exposedMicrosoft.WindowsDesktop.App.Runtime.win-arm64 (nuget) >=10.0.0, <= 10.0.12;Microsoft.WindowsDesktop.App.Runtime.win-x64 (nuget) >=…RED · ACT TODAYMicrosoft.WindowsDesktop.App.Ru…Deserialization of untrusteddata in .NET Framework allowsan unauthorized attacker toexecute code over a network.Where it standsNo known exploitationCONNECTS TOSame weaknessCWE-346 (CWE-346)54 other warnings in 30 days →
Story map: the flaws, the fix, how it unfolded and what it connects to. Boxes link to the record or article.

At a glance

Microsoft.WindowsDesktop.App.Runtime.win-arm64: Red, act today. Deserialization of untrusted data in .NET Framework allows an unauthorized attacker to execute code over a network.

The flaws

  • CVE-2026-96234: Microsoft Security Advisory CVE-2026-96234 - .NET and Visual Studio Information Disclosure Vulnerability (CVSS 5.3 · EPSS 0%)
  • CVE-2026-70035: Microsoft Security Advisory CVE-2026-70035 - .NET and Visual Studio Remote Code Execution Vulnerability (CVSS 8.8 · EPSS 1%)
  • CVE-2026-83520: Microsoft Security Advisory CVE-2026-83520 - .NET and Visual Studio Remote Code Execution Vulnerability (CVSS 8.8 · EPSS 1%)
  • CVE-2026-87697: Microsoft Security Advisory CVE-2026-87697 - .NET and Visual Studio Remote Code Execution Vulnerability (CVSS 8.8 · EPSS 1%)

The fix

Fix: Upgrade Microsoft.WindowsDesktop.App.Runtime.win-arm64 to 10.0.13 or 8.0.32 or 9.0.21; Microsoft.WindowsDesktop.App.Runtime.win-x64 to 10.0.13 or 8.0.32 or 9.0.21; Microsoft.WindowsDesktop.App.Runtime.win-x86 to 10.0.13 or 8.0.32 (whichever matches your release line) or later.

Who is exposed: Microsoft.WindowsDesktop.App.Runtime.win-arm64 (nuget) >= 10.0.0, <= 10.0.12; Microsoft.WindowsDesktop.App.Runtime.win-x64 (nuget) >= 10.0.0, <= 10.0.12; Microsoft.WindowsDesktop.App.Runtime.win-x86 (nuget) >= 10.0.0, <= 10.0.12; Microsoft.WindowsDesktop.App.Runtime.win-arm64 (nuget) >= 8.0.0, <= 8…

Where it stands

  • No known exploitation

Connects to

Why it is Yellow

  • CVSS 5.3 medium
  • On your watchlist: .net, NuGet

Affected packages

PackageEcosystemVulnerableFixed in
Microsoft.WindowsDesktop.App.Runtime.win-arm64nuget>= 9.0.0, <= 9.0.209.0.21
Microsoft.WindowsDesktop.App.Runtime.win-x64nuget>= 9.0.0, <= 9.0.209.0.21
Microsoft.WindowsDesktop.App.Runtime.win-x86nuget>= 9.0.0, <= 9.0.209.0.21
Microsoft.WindowsDesktop.App.Runtime.win-arm64nuget>= 10.0.0, <= 10.0.1210.0.13
Microsoft.WindowsDesktop.App.Runtime.win-x64nuget>= 10.0.0, <= 10.0.1210.0.13
Microsoft.WindowsDesktop.App.Runtime.win-x86nuget>= 10.0.0, <= 10.0.1210.0.13
Microsoft.WindowsDesktop.App.Runtime.win-arm64nuget>= 8.0.0, <= 8.0.318.0.32
Microsoft.WindowsDesktop.App.Runtime.win-x64nuget>= 8.0.0, <= 8.0.318.0.32
Microsoft.WindowsDesktop.App.Runtime.win-x86nuget>= 8.0.0, <= 8.0.318.0.32
Microsoft.WindowsDesktop.App.Runtime.win-arm64nuget>= 11.0.0-preview.1, <= 11.0.0-rc.111.0.0-rc.2
Microsoft.WindowsDesktop.App.Runtime.win-x64nuget>= 11.0.0-preview.1, <= 11.0.0-rc.111.0.0-rc.2
Microsoft.WindowsDesktop.App.Runtime.win-x86nuget>= 11.0.0-preview.1, <= 11.0.0-rc.111.0.0-rc.2

References

Original description

Origin validation error in .NET allows an unauthorized attacker to disclose information over a network.

Last activity 13 Oct 2026. Patch Forecast updates every hour.