.NET and .NET Framework October 2025 servicing releases updates

Welcome to our combined .NET servicing updates for October 2025. Let’s get into the latest release of .NET & .NET Framework, here is a quick overview of what’s new in our servicing releases:

Security improvements

.NET and .NET Framework has been refreshed with the latest update as of October 14, 2025. This update contains security and non-security fixes.

This month you will find that these CVEs have been fixed:

CVE #	Title	Applies to
CVE-2025-55248	.NET Information Disclosure Vulnerability	.NET 9.0, .NET 8.0
CVE-2025-55315	.NET Security Feature Bypass Vulnerability	.NET 9.0, .NET 8.0
CVE-2025-55247	.NET Denial of Service Vulnerability	.NET 9.0, .NET 8.0
CVE-2025-21176	.NET Remote Code Execution Vulnerability	.NET Framework 3.5, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1

	.NET 8.0	.NET 9.0
Release Notes	8.0.21	9.0.10
Installers and binaries	8.0.21	9.0.10
Container Images	images	images
Linux packages	8.0.21	9.0.10
Known Issues	8.0	9.0

Release changelogs

Runtime: 8.0.21 | 9.0.10
Aspnetcore: 8.0.21 | 9.0.10
SDK: 9.0.10 | 8.0.21
Installer: 8.0.21
Arcade: 8.0.21 | 9.0.10 Share feedback about this release in the Release feedback issue.

.NET Framework October 2025 Updates

This month, there are new security updates and new non-security updates available. For recent .NET Framework servicing updates, be sure to browse our release notes for .NET Framework for more details.