[DevBlog MS] .NET and .NET Framework September 2026 servicing releases updates

[xSicKxBot]

Welcome to our combined .NET servicing updates for September 2026. Let’s get into the latest release of .NET and .NET Framework. Here’s a quick overview of what’s new in our servicing releases:

Security improvements

.NET has been refreshed with the latest update as of September 8, 2026. This update contains security and non-security fixes.

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

CVE #
Title
Applies to

CVE-2026-69805
.NET Security Vulnerability
.NET 10.0, .NET 9.0, .NET 8.0

CVE-2026-69439
.NET Security Vulnerability
.NET 10.0, .NET 9.0, .NET 8.0

CVE-2026-71328
.NET Security Vulnerability
.NET 10.0, .NET 9.0, .NET 8.0

CVE-2026-69522
.NET Security Vulnerability
.NET 10.0, .NET 9.0, .NET 8.0, .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1

CVE-2026-69304
.NET Security Vulnerability
.NET 10.0, .NET 9.0, .NET 8.0

CVE-2026-58649
.NET Security Vulnerability
.NET 10.0, .NET 9.0, .NET 8.0

CVE-2026-66822
.NET Security Vulnerability
.NET 10.0, .NET 9.0, .NET 8.0

CVE-2026-69806
.NET Security Vulnerability
.NET 10.0, .NET 9.0, .NET 8.0

.NET 10.0
.NET 9.0
.NET 8.0

Release Notes
10.0.12
9.0.20
8.0.31

Installers and binaries
10.0.12
9.0.20
8.0.31

Container Images
images
images
images

Linux packages
10.0
9.0
8.0

Known Issues
10.0
9.0
8.0

Release changelogs

• ASP.NET Core: 10.0.12 | 9.0.20 | 8.0.31
  
  
• Entity Framework Core: 10.0.12 | 9.0.20 | 8.0.31
  
  
• Runtime: 10.0.12 | 9.0.20 | 8.0.31
  
  

.NET Framework September 2026 Updates

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

See you next month

That’s it for this month, make sure you update to the latest service release today.

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