CVE-2025-21172: Microsoft Security Advisory | .NET and Visual Studio Remote Code Execution Vulnerability

Quick answers

Is CVE-2025-21172 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2025-21172 being exploited in the wild.

How severe is CVE-2025-21172?

Low severity, with a CVSS score of 3.1, published 14 January 2025.

Which products and versions are affected?

Microsoft.NetCore.App.Runtime.linux-arm (NuGet) ECOSYSTEM:introduced=9.0.0,fixed=9.0.1; Microsoft.NetCore.App.Runtime.linux-arm64 (NuGet) ECOSYSTEM:introduced=9.0.0,fixed=9.0.1; Microsoft.NetCore.App.Runtime.linux-musl-arm (NuGet) ECOSYSTEM:introduced=9.0.0,fixed=9.0.1; Microsoft.NetCore.App.Runtime.linux-musl-arm64 (NuGet) ECOSYSTEM:introduced=9.0.0,fixed=9.0.1; and 8 more.

Is there a fix for CVE-2025-21172?

Yes. Microsoft.NetCore.App.Runtime.linux-arm (NuGet): upgrade to 9.0.1 or later; Microsoft.NetCore.App.Runtime.linux-arm64 (NuGet): upgrade to 9.0.1 or later; Microsoft.NetCore.App.Runtime.linux-musl-arm (NuGet): upgrade to 9.0.1 or later; Microsoft.NetCore.App.Runtime.linux-musl-arm64 (NuGet): upgrade to 9.0.1 or later; Microsoft.NetCore.App.Runtime.linux-musl-x64 (NuGet): upgrade to 9.0.1 or later; Microsoft.NetCore.App.Runtime.linux-x64 (NuGet): upgrade to 9.0.1 or later; Microsoft.NetCore.App.Runtime.osx-arm64 (NuGet): upgrade to 9.0.1 or later; Microsoft.NetCore.App.Runtime.osx-x64 (NuGet): upgrade to 9.0.1 or later; Microsoft.NetCore.App.Runtime.win-arm (NuGet): upgrade to 9.0.1 or later; Microsoft.NetCore.App.Runtime.win-arm64 (NuGet): upgrade to 9.0.1 or later; Microsoft.NetCore.App.Runtime.win-x64 (NuGet): upgrade to 9.0.1 or later; Microsoft.NetCore.App.Runtime.win-x86 (NuGet): upgrade to 9.0.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Am I affected by CVE-2025-21172?

Check whether you run Microsoft.NetCore.App.Runtime.linux-arm (NuGet), Microsoft.NetCore.App.Runtime.linux-arm64 (NuGet), Microsoft.NetCore.App.Runtime.linux-musl-arm (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.NetCore.App.Runtime.linux-arm (NuGet): upgrade to 9.0.1 or later

  dotnet add package Microsoft.NetCore.App.Runtime.linux-arm --version 9.0.1

• Microsoft.NetCore.App.Runtime.linux-arm64 (NuGet): upgrade to 9.0.1 or later

  dotnet add package Microsoft.NetCore.App.Runtime.linux-arm64 --version 9.0.1

• Microsoft.NetCore.App.Runtime.linux-musl-arm (NuGet): upgrade to 9.0.1 or later

  dotnet add package Microsoft.NetCore.App.Runtime.linux-musl-arm --version 9.0.1

• Microsoft.NetCore.App.Runtime.linux-musl-arm64 (NuGet): upgrade to 9.0.1 or later

  dotnet add package Microsoft.NetCore.App.Runtime.linux-musl-arm64 --version 9.0.1

• Microsoft.NetCore.App.Runtime.linux-musl-x64 (NuGet): upgrade to 9.0.1 or later

  dotnet add package Microsoft.NetCore.App.Runtime.linux-musl-x64 --version 9.0.1

• Microsoft.NetCore.App.Runtime.linux-x64 (NuGet): upgrade to 9.0.1 or later

  dotnet add package Microsoft.NetCore.App.Runtime.linux-x64 --version 9.0.1

• Microsoft.NetCore.App.Runtime.osx-arm64 (NuGet): upgrade to 9.0.1 or later

  dotnet add package Microsoft.NetCore.App.Runtime.osx-arm64 --version 9.0.1

• Microsoft.NetCore.App.Runtime.osx-x64 (NuGet): upgrade to 9.0.1 or later

  dotnet add package Microsoft.NetCore.App.Runtime.osx-x64 --version 9.0.1

• Microsoft.NetCore.App.Runtime.win-arm (NuGet): upgrade to 9.0.1 or later

  dotnet add package Microsoft.NetCore.App.Runtime.win-arm --version 9.0.1

• Microsoft.NetCore.App.Runtime.win-arm64 (NuGet): upgrade to 9.0.1 or later

  dotnet add package Microsoft.NetCore.App.Runtime.win-arm64 --version 9.0.1

• Microsoft.NetCore.App.Runtime.win-x64 (NuGet): upgrade to 9.0.1 or later

  dotnet add package Microsoft.NetCore.App.Runtime.win-x64 --version 9.0.1

• Microsoft.NetCore.App.Runtime.win-x86 (NuGet): upgrade to 9.0.1 or later

  dotnet add package Microsoft.NetCore.App.Runtime.win-x86 --version 9.0.1

Affected products

• Microsoft.NetCore.App.Runtime.linux-arm (NuGet) ECOSYSTEM:introduced=9.0.0,fixed=9.0.1
• Microsoft.NetCore.App.Runtime.linux-arm64 (NuGet) ECOSYSTEM:introduced=9.0.0,fixed=9.0.1
• Microsoft.NetCore.App.Runtime.linux-musl-arm (NuGet) ECOSYSTEM:introduced=9.0.0,fixed=9.0.1
• Microsoft.NetCore.App.Runtime.linux-musl-arm64 (NuGet) ECOSYSTEM:introduced=9.0.0,fixed=9.0.1
• Microsoft.NetCore.App.Runtime.linux-musl-x64 (NuGet) ECOSYSTEM:introduced=9.0.0,fixed=9.0.1
• Microsoft.NetCore.App.Runtime.linux-x64 (NuGet) ECOSYSTEM:introduced=9.0.0,fixed=9.0.1
• Microsoft.NetCore.App.Runtime.osx-arm64 (NuGet) ECOSYSTEM:introduced=9.0.0,fixed=9.0.1
• Microsoft.NetCore.App.Runtime.osx-x64 (NuGet) ECOSYSTEM:introduced=9.0.0,fixed=9.0.1
• Microsoft.NetCore.App.Runtime.win-arm (NuGet) ECOSYSTEM:introduced=9.0.0,fixed=9.0.1
• Microsoft.NetCore.App.Runtime.win-arm64 (NuGet) ECOSYSTEM:introduced=9.0.0,fixed=9.0.1
• Microsoft.NetCore.App.Runtime.win-x64 (NuGet) ECOSYSTEM:introduced=9.0.0,fixed=9.0.1
• Microsoft.NetCore.App.Runtime.win-x86 (NuGet) ECOSYSTEM:introduced=9.0.0,fixed=9.0.1

Identifiers

• CVE-2025-21172
• GHSA-jjcv-wr2g-4rv4