.NET October 2025 Updates

On October 14, 2025, we released .NET 9.0.10, .NET 8.0.21 updates.

## Release Notes

* [.NET October 2025 Update - .NET 9.0.10 and .NET 8.0.21](https://github.com/dotnet/core/issues/10120)
* [.NET 8.0.21 and .NET SDK 8.0.415](https://github.com/dotnet/core/blob/main/release-notes/8.0/8.0.21/8.0.21.md) ([Download](https://dotnet.microsoft.com/download/dotnet-core/8.0))
* [.NET 9.0.10 and .NET SDK 9.0.306](https://github.com/dotnet/core/blob/main/release-notes/9.0/9.0.10/9.0.10.md) ([Download](https://dotnet.microsoft.com/download/dotnet-core/9.0))


Also announced at [.NET Updates in October 2025](https://devblogs.microsoft.com/dotnet/dotnet-and-dotnet-framework-october-2025-servicing-updates/).

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.NET October 2025 Updates #373

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