Tara Overfield and Victor Israel-Bolarinwa provide a thorough overview of the October 2025 .NET and .NET Framework servicing updates, highlighting key security patches and release details.

.NET and .NET Framework October 2025 Servicing Updates

By Tara Overfield and Victor Israel-Bolarinwa

This post presents an overview of the most recent servicing updates for .NET and .NET Framework released in October 2025, focusing on both security and non-security improvements.

Security Improvements

The October 14, 2025 update addresses several vulnerabilities:

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

These vulnerabilities include information disclosure, security feature bypass, denial of service, and remote code execution affecting multiple supported versions. All recommended updates include both security and non-security fixes.

Feedback on this release can be provided in the Release feedback issue.

.NET Framework October 2025 Updates

New security and non-security updates have been made available for .NET Framework. See the latest release notes for .NET Framework for details.

Recommendation

All developers and administrators should update to the latest servicing releases to maintain secure, supported environments. Regularly reviewing and applying these updates is critical for ongoing security and support.

For more information and continuing updates, visit the official .NET Blog.

This post appeared first on “Microsoft .NET Blog”. Read the entire article here