MS16-065: Description of the security update for the .NET Framework 4.6.1 in Windows 7 SP1 and Windows Server 2008 R2 SP1 and the .NET Framework 4.6 in Windows Vista SP2 and Windows Server 2008 SP2: May 10, 2016

This security update resolves a vulnerability in Microsoft .NET Framework. The vulnerability could cause information disclosure if an attacker injects unencrypted data in the target secure channel and then performs a man-in-the-middle (MiTM) attack between the targeted client and a legitimate server. To learn more about these vulnerabilities, see Microsoft Security Bulletin MS16-065 and the following article in the Microsoft Knowledge Base:
3155464 MS16-065: Description of the TLS/SSL protocol information disclosure vulnerability (CVE-2016-0149): May 10, 2016
To install this update, you must have Windows Installer 3.1 or a later version installed on the computer.

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 get security updates automatically, see the "Turn on automatic updating in the Control Panel" section of this Safety & Security Center article.

Method 2: Microsoft Download Center

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

DownloadDownload security update 3142037

Update deployment information

For deployment information about this update, see Microsoft Knowledge Base Article 3156757.

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

File hash

Package NamePackage Hash SHA 1Package Hash SHA 2

File attributes

The English (United States) version of this update installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

For all supported x86-based versions

File nameFile versionFile sizeDateTimePlatform

For all supported x64-based versions

File nameFile versionFile sizeDateTimePlatform
System.dll 4.6.1075.03,460,73626-Feb-201602:21x64

How to obtain help and support for this security update

Help for installing updates: Support for Microsoft Update

Security solutions for IT professionals: TechNet Security Troubleshooting and Support

Help for protecting your Windows-based computer from viruses and malware: Virus Solution and Security Center

Local support according to your country: International Support

Applies to

This article applies to the following:
  • Microsoft .NET Framework 4.6.1 when used with:
    • Windows Server 2008 R2 Service Pack 1
    • Windows 7 Service Pack 1
  • Microsoft .NET Framework 4.6 when used with:
    • Windows Server 2008 R2 Service Pack 1
    • Windows 7 Service Pack 1
    • Windows Server 2008 Service Pack 2
    • Windows Vista Service Pack 2

Article ID: 3142037 - Last Review: 05/10/2016 17:05:00 - Revision: 1.0

Microsoft .NET Framework 4.6.1, Microsoft .NET Framework 4.6

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