MS15-101: Description of the security update for the .NET Framework 4.6 and 4.6 RC on Windows 8.1 and Windows Server 2012 R2: September 8, 2015


This update resolves vulnerabilities in the Microsoft .NET Framework that could allow elevation of privilege if a user runs a specially crafted .NET Framework application. To learn more about this vulnerability, see Microsoft Security Bulletin MS15-101.

More Information


All future security and nonsecurity updates for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 require update 2919355 to be installed. We recommend that you install update 2919355 on your Windows RT 8.1-based, Windows 8.1-based, or Windows Server 2012 R2-based computer so that you receive future updates.

How to obtain and install this update

Method 1: Windows Update

This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to turn on automatic updating, see Get security updates automatically.

Method 2: Microsoft Download Center

You can obtain the stand-alone update package through the Microsoft Download Center. To install this update, follow the installation instructions on the download page.

Download Download security update 3074553

Update deployment information

For deployment information about this update, see Microsoft Knowledge Base Article 3089662 .

Update removal information

Note We do not recommend that you remove any security update.

To remove this update, use the Programs and Features item in Control Panel.

Update restart information

This update does not require a system restart after you apply it unless files that are being updated are locked or are being used.

Update replacement information

This update does not replace any previously released update.

File information
How to obtain help and support for this security update

Applies to

This article applies to the following:
  • Microsoft .NET Framework 4.6 when used with:
    • Windows Server 2012 R2
    • Windows 8.1
  • Microsoft .NET Framework 4.6 RC when used with:
    • Windows Server 2012 R2
    • Windows 8.1

Article ID: 3074553 - Last Review: Sep 8, 2015 - Revision: 1