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.
