The .NET 2.1.25 and .NET SDK 2.1.521 releases are available for download. The latest 2.1 release is always listed at .NET 2.1 Releases.
| SDK Installer1 | SDK Binaries1 | Runtime Installer | Runtime Binaries | ASP.NET Core Runtime | |
|---|---|---|---|---|---|
| Windows | x86 | x64 | x86 | x64 | x86 | x64 | x86 | x64 | ARM | x86 | x64 | Hosting Bundle2 |
| macOS | x64 | x64 | x64 | x64 | x641 |
| Linux | See installation steps | x64 | ARM | ARM64 | x64 Alpine | - | x64 | ARM | ARM64 | x64 Alpine | x641 | ARM1 | x64 Alpine1 |
| Checksums | SDK | - | Runtime | - | - |
The .NET SDK includes a matching updated .NET Runtime. Downloading the Runtime or ASP.NET Core packages is not needed when installing the SDK.
You can check your .NET SDK version by running the following command. The example version shown is for this release.
$ dotnet --version
2.1.521
Visit .NET Documentation to learn about .NET, for building many different types of applications.
The .NET Core Docker images have been updated for this release. The .NET Docker samples show various ways to use .NET and Docker together.
The following repos have been updated:
This update for .NET Core 2.1 includes multiple SDK builds. If you are a Visual Studio 2019, Visual Studio 2017 or Visual Studio for Mac user, there are MSBuild version requirements that are satisfied by specific, matching .NET Core SDK versions. See the following table to select the correct download.
| OS | Development Environment | .NET Core SDK |
|---|---|---|
| Windows | Visual Studio 2017 | 2.1.521 |
| macOS | Visual Studio for Mac | Visual Studio for Mac .NET Core Support |
Note: This is not a security release hence this update won’t be immediately available through Visual Studio. However, this is expected to show up in Visual Studio’s January servicing release.
This update of .NET Core 2.1 is the last update for .NET Core 2.1.6xx SDK since Visual Studio 16.0 is out of support as of January 2021. We will continue to update versions 2.1.5xx and 2.1.8xx until .NET Core 2.1 reaches end of life.
.NET Core 2.1.25 release carries both security and non-security fixes.
Microsoft is releasing this security advisory to provide information about a vulnerability in ASP.NET Core and ASP.NET 5. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.
A denial-of-service vulnerability exists when creating HTTPS web request during X509 certificate chain building.
Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 5.0, .NET Core 3.1, and .NET Core 2.1. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.
A remote code execution vulnerability exists when parsing certain types of graphics files. This vulnerability only exists on systems running on MacOS or Linux.
Your feedback is important and appreciated. We’ve created an issue at dotnet/core #5932 for your questions and comments.
| Package name | Version |
|---|---|
| microsoft.aspnetcore.all | 2.1.25.nupkg |
| microsoft.aspnetcore.app | 2.1.25.nupkg |
| microsoft.aspnetcore.server.kestrel.core | 2.1.25.nupkg |
| microsoft.dotnet.web.client.itemtemplates | 2.1.25.nupkg |
| microsoft.dotnet.web.itemtemplates | 2.1.25.nupkg |
| microsoft.dotnet.web.projecttemplates.2.1 | 2.1.25.nupkg |
| microsoft.dotnet.web.spa.projecttemplates.2.1 | 2.1.25.nupkg |
| system.drawing.common | 4.5.2.nupkg |
| microsoft.netcore.app | 2.1.25.nupkg |
| microsoft.netcore.dotnetapphost | 2.1.25.nupkg |
| microsoft.netcore.dotnethost | 2.1.25.nupkg |
| microsoft.netcore.dotnethostpolicy | 2.1.25.nupkg |
| microsoft.netcore.dotnethostresolver | 2.1.25.nupkg |
| runtime.linux-arm.microsoft.netcore.app | 2.1.25.nupkg |
| runtime.linux-arm.microsoft.netcore.dotnetapphost | 2.1.25.nupkg |
| runtime.linux-arm.microsoft.netcore.dotnethost | 2.1.25.nupkg |
| runtime.linux-arm.microsoft.netcore.dotnethostpolicy | 2.1.25.nupkg |
| runtime.linux-arm.microsoft.netcore.dotnethostresolver | 2.1.25.nupkg |
| runtime.linux-arm64.microsoft.netcore.app | 2.1.25.nupkg |
| runtime.linux-arm64.microsoft.netcore.dotnetapphost | 2.1.25.nupkg |
| runtime.linux-arm64.microsoft.netcore.dotnethost | 2.1.25.nupkg |
| runtime.linux-arm64.microsoft.netcore.dotnethostpolicy | 2.1.25.nupkg |
| runtime.linux-arm64.microsoft.netcore.dotnethostresolver | 2.1.25.nupkg |
| runtime.linux-musl-x64.microsoft.netcore.app | 2.1.25.nupkg |
| runtime.linux-musl-x64.microsoft.netcore.dotnetapphost | 2.1.25.nupkg |
| runtime.linux-musl-x64.microsoft.netcore.dotnethost | 2.1.25.nupkg |
| runtime.linux-musl-x64.microsoft.netcore.dotnethostpolicy | 2.1.25.nupkg |
| runtime.linux-musl-x64.microsoft.netcore.dotnethostresolver | 2.1.25.nupkg |
| runtime.linux-x64.microsoft.netcore.app | 2.1.25.nupkg |
| runtime.linux-x64.microsoft.netcore.dotnetapphost | 2.1.25.nupkg |
| runtime.linux-x64.microsoft.netcore.dotnethost | 2.1.25.nupkg |
| runtime.linux-x64.microsoft.netcore.dotnethostpolicy | 2.1.25.nupkg |
| runtime.linux-x64.microsoft.netcore.dotnethostresolver | 2.1.25.nupkg |
| runtime.osx-x64.microsoft.netcore.app | 2.1.25.nupkg |
| runtime.osx-x64.microsoft.netcore.dotnetapphost | 2.1.25.nupkg |
| runtime.osx-x64.microsoft.netcore.dotnethost | 2.1.25.nupkg |
| runtime.osx-x64.microsoft.netcore.dotnethostpolicy | 2.1.25.nupkg |
| runtime.osx-x64.microsoft.netcore.dotnethostresolver | 2.1.25.nupkg |
| runtime.rhel.6-x64.microsoft.netcore.app | 2.1.25.nupkg |
| runtime.rhel.6-x64.microsoft.netcore.dotnetapphost | 2.1.25.nupkg |
| runtime.rhel.6-x64.microsoft.netcore.dotnethost | 2.1.25.nupkg |
| runtime.rhel.6-x64.microsoft.netcore.dotnethostpolicy | 2.1.25.nupkg |
| runtime.rhel.6-x64.microsoft.netcore.dotnethostresolver | 2.1.25.nupkg |
| runtime.win-arm.microsoft.netcore.app | 2.1.25.nupkg |
| runtime.win-arm.microsoft.netcore.dotnetapphost | 2.1.25.nupkg |
| runtime.win-arm.microsoft.netcore.dotnethost | 2.1.25.nupkg |
| runtime.win-arm.microsoft.netcore.dotnethostpolicy | 2.1.25.nupkg |
| runtime.win-arm.microsoft.netcore.dotnethostresolver | 2.1.25.nupkg |
| runtime.win-arm64.microsoft.netcore.app | 2.1.25.nupkg |
| runtime.win-arm64.microsoft.netcore.dotnetapphost | 2.1.25.nupkg |
| runtime.win-arm64.microsoft.netcore.dotnethost | 2.1.25.nupkg |
| runtime.win-arm64.microsoft.netcore.dotnethostpolicy | 2.1.25.nupkg |
| runtime.win-arm64.microsoft.netcore.dotnethostresolver | 2.1.25.nupkg |
| runtime.win-x64.microsoft.netcore.app | 2.1.25.nupkg |
| runtime.win-x64.microsoft.netcore.dotnetapphost | 2.1.25.nupkg |
| runtime.win-x64.microsoft.netcore.dotnethost | 2.1.25.nupkg |
| runtime.win-x64.microsoft.netcore.dotnethostpolicy | 2.1.25.nupkg |
| runtime.win-x64.microsoft.netcore.dotnethostresolver | 2.1.25.nupkg |
| runtime.win-x86.microsoft.netcore.app | 2.1.25.nupkg |
| runtime.win-x86.microsoft.netcore.dotnetapphost | 2.1.25.nupkg |
| runtime.win-x86.microsoft.netcore.dotnethost | 2.1.25.nupkg |
| runtime.win-x86.microsoft.netcore.dotnethostpolicy | 2.1.25.nupkg |
| runtime.win-x86.microsoft.netcore.dotnethostresolver | 2.1.25.nupkg |
| vs.redist.common.netcore.hostfxr.x64.2.1 | 2.1.25-servicing-29719-01.nupkg |
| vs.redist.common.netcore.hostfxr.x64.2.1 | 2.1.25-servicing-29719-02.nupkg |
| vs.redist.common.netcore.hostfxr.x64.2.1 | 2.1.25-servicing-29720-01.nupkg |
| vs.redist.common.netcore.hostfxr.x86.2.1 | 2.1.25-servicing-29719-01.nupkg |
| vs.redist.common.netcore.hostfxr.x86.2.1 | 2.1.25-servicing-29719-02.nupkg |
| vs.redist.common.netcore.hostfxr.x86.2.1 | 2.1.25-servicing-29720-01.nupkg |
| vs.redist.common.netcore.sharedframework.x64.2.1 | 2.1.25-servicing-29719-01.nupkg |
| vs.redist.common.netcore.sharedframework.x64.2.1 | 2.1.25-servicing-29719-02.nupkg |
| vs.redist.common.netcore.sharedframework.x64.2.1 | 2.1.25-servicing-29720-01.nupkg |
| vs.redist.common.netcore.sharedframework.x86.2.1 | 2.1.25-servicing-29719-01.nupkg |
| vs.redist.common.netcore.sharedframework.x86.2.1 | 2.1.25-servicing-29719-02.nupkg |
| vs.redist.common.netcore.sharedframework.x86.2.1 | 2.1.25-servicing-29720-01.nupkg |
| vs.redist.common.netcore.sharedhost.x64.2.1 | 2.1.25-servicing-29719-01.nupkg |
| vs.redist.common.netcore.sharedhost.x64.2.1 | 2.1.25-servicing-29719-02.nupkg |
| vs.redist.common.netcore.sharedhost.x64.2.1 | 2.1.25-servicing-29720-01.nupkg |
| vs.redist.common.netcore.sharedhost.x86.2.1 | 2.1.25-servicing-29719-01.nupkg |
| vs.redist.common.netcore.sharedhost.x86.2.1 | 2.1.25-servicing-29719-02.nupkg |
| vs.redist.common.netcore.sharedhost.x86.2.1 | 2.1.25-servicing-29720-01.nupkg |