Applies To.NET Framework 4.6.1 .NET Framework 4.6.2 .NET Framework 3.5.1

View products that this article applies to.

Summary

This security update resolves a vulnerability in the 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 the vulnerability, see Microsoft Security Bulletin MS16-065.

More Information

Important

  • 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.

  • If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

Known issues in this security update

  • After you install any of the security updates that are included in MS16-065 on a Front End or Standard Edition server for Lync Server 2010, Lync Server 2013, or Skype for Business Server 2015, several conferencing modalities no longer function for internal users.For more information, click the following article number to view the article in the Microsoft Knowledge Base:

    3165438 Conferencing modalities no longer function in Lync Server 2010, Lync Server 2013, or Skype for Business Server 2015 after you install Security Bulletin MS16-065

Additional information about this security update

The following articles contain additional information about this security update as it relates to individual product versions. The articles may contain known issue information.

Microsoft .NET Framework 4.6 and 4.6.1

  • 3142036 MS16-065: Description of the security update for the .NET Framework 4.6 and 4.6.1 in Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2: May 10, 2016

  • 3142037 MS16-065: Description of the security update for the .NET Framework 4.6 in Windows 7 SP1 and Windows Server 2008 R2 SP1 and the .NET Framework 4.6.1 in Windows Vista SP2 and Windows Server 2008 SP2: May 10, 2016

  • 3142035 MS16-065: Description of the security update for the .NET Framework 4.6 and 4.6.1 in Windows Server 2012: May 10, 2016

Microsoft .NET Framework 4.5.2

  • 3142030 MS16-065: Description of the security update for the .NET Framework 4.5.2 in Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2: May 10, 2016

  • 3142033 MS16-065: Description of the security update for the .NET Framework 4.5.2 in Windows Vista Service Pack 2, Windows Server 2008 Service Pack 2, Windows 7 Service Pack 1, and Windows Server 2008 R2 Service Pack 1: May 10, 2016

  • 3142032 MS16-065: Description of the security update for the .NET Framework 4.5.2 in Windows Server 2012: May 10, 2016

Microsoft .NET Framework 3.5 and 3.5.1

  • 3142024 MS16-065: Description of the security update for the .NET Framework 3.5.1 in Windows 7 Service Pack 1 and Windows Server 2008 R2 Service Pack 1: May 10, 2016

  • 3142026 MS16-065: Description of the security update for the .NET Framework 3.5 in Windows 8.1 and Windows Server 2012 R2: May 10, 2016

  • 3142025 MS16-065: Description of the security update for the .NET Framework 3.5 in Windows Server 2012: May 10, 2016

Microsoft .NET Framework 2.0

  • 3142023 MS16-065: Description of the security update for the .NET Framework 2.0 Service Pack 2 in Windows Vista Service Pack 2 and Windows Server 2008 Service Pack 2: May 10, 2016

Windows Vista (all editions)

Reference TableThe following table contains the security update information for this software.

Security update file names

For Microsoft .NET Framework 2.0 Service Pack 2 on all supported 32-bit editions of Windows Vista:Windows6.0-KB3142023-x86.msu

For Microsoft .NET Framework 4.5.2 when installed on all supported 32-bit editions of Windows Vista:NDP45-KB3142033-x86.exe

For Microsoft .NET Framework 4.6 when installed on all supported 32-bit editions of Windows Vista:NDP46-KB3142037-x86.exe

For Microsoft .NET Framework 2.0 Service Pack 2 on all supported x64-based editions of Windows Vista:Windows6.0-KB3142023-x64.msu

For Microsoft .NET Framework 4.5.2 when installed on all supported x64-based editions of Windows Vista:NDP45-KB3142033-x64.exe

For Microsoft .NET Framework 4.6 when installed on all supported x64-based editions of Windows Vista:NDP46-KB3142037-x64.exe

Installation switches

For Microsoft .NET Framework, see Microsoft Knowledge Base Article 2844699

Update log file

For Microsoft .NET Framework 2.0 Service Pack 2:Not applicable

For Microsoft .NET Framework 4.5.2:KB3142033_*_*-Microsoft .NET Framework [.NET target version]-MSP0.txtKB3142033_*_*.html

For Microsoft .NET Framework 4.6:KB3142037_*_*-Microsoft .NET Framework 4.6/4.6.1-MSP0.txtKB3142037_*_*.html

Restart requirement

This update does not require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart.

Removal information

Click Control Panel, and then click Security. Under Windows Update, click View installed updates and select from the list of updates.

File information

See the individual Knowledge Base articles that are listed in the “Additional information about this security update” section.

Registry key verification

For Microsoft .NET Framework 2.0 Service Pack 2 (3142023):A registry key does not exist to validate the presence of this update. Use WMI to detect for the presence of this update.

For Microsoft .NET Framework 4.5.2:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework [.NET target version]\KB3142033”ThisVersionInstalled” = “Y”

For Microsoft .NET Framework 4.6:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework 4.6\KB3142037"ThisVersionInstalled" = "Y"

Windows Server 2008 (all editions)

Reference TableThe following table contains the security update information for this software.

Security update file names

For Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2:Windows6.0-KB3142023-x86.msu

For Microsoft .NET Framework 4.5.2 when installed on all supported 32-bit editions of Windows Server 2008 Service Pack 2:NDP45-KB3142033-x86.exe

For Microsoft .NET Framework 4.6 when installed on all supported 32-bit editions of Windows Server 2008 Service Pack 2:NDP46-KB3142037-x86.exe

For Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2:Windows6.0-KB3142023-x64.msu

For Microsoft .NET Framework 4.5.2 on all supported x64-based editions of Windows Server 2008 Service Pack 2:NDP45-KB3142033-x64.exe

For Microsoft .NET Framework 4.6 on all supported x64-based editions of Windows Server 2008 Service Pack 2:NDP46-KB3142037-x64.exe

For Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for Itanium-based Systems Service Pack 2:Windows6.0-KB3142023-ia64.msu

Installation switches

See Microsoft Knowledge Base Article 2844699

Update log file

For Microsoft .NET Framework 2.0 Service Pack 2:Not applicable

For Microsoft .NET Framework 4.5.2:KB3142033_*_*-Microsoft .NET Framework [.NET target version]-MSP0.txtKB3142033_*_*.html

For Microsoft .NET Framework 4.6:KB3142037_*_*-Microsoft .NET Framework 4.6/4.6.1-MSP0.txtKB3142037_*_*.html

Restart requirement

This update does not require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart.

Removal information

Click Control Panel, and then click Security. Under Windows Update, click View installed updates and select from the list of updates.

File information

See the individual Knowledge Base articles that are listed in the “Additional information about this security update” section.

Registry key verification

For Microsoft .NET Framework 2.0 Service Pack 2 (3142023):A registry key does not exist to validate the presence of this update. Use WMI to detect for the presence of this update.

For Microsoft .NET Framework 4.5.2:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework [.NET target version]\KB3142033”ThisVersionInstalled” = “Y”

For Microsoft .NET Framework 4.6:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework 4.6\KB3142037"ThisVersionInstalled" = "Y"

Windows 7 (all editions)

Reference TableThe following table contains the security update information for this software.

Security update file name

For Microsoft .NET Framework 3.5.1 on all supported 32-bit editions of Windows 7 Service Pack 1:Windows6.1-KB3142024-x86.msu

For Microsoft .NET Framework 4.5.2 when installed on all supported 32-bit editions of Windows 7 Service Pack 1:NDP45-KB3142033-x86.exe

For Microsoft .NET Framework 4.6/4.6.1 when installed on all supported 32-bit editions of Windows 7 Service Pack 1:NDP46-KB3142037-x86.exe

For Microsoft .NET Framework 3.5.1 on all supported x64-based editions of Windows 7 Service Pack 1:Windows6.1-KB3142024-x64.msu

For Microsoft .NET Framework 4.5.2 when installed on all supported x64-based editions of Windows 7 Service Pack 1:NDP45-KB3142033-x64.exe

For Microsoft .NET Framework 4.6/4.6.1 when installed on all supported x64-based editions of Windows 7 Service Pack 1:NDP46-KB3142037-x64.exe

Installation switches

See Microsoft Knowledge Base Article 2844699

Update log file

For Microsoft .NET Framework 3.5.1:Not applicable.

For Microsoft .NET Framework 4.5.2:KB3142033_*_*-Microsoft .NET Framework [.NET target version]-MSP0.txtKB3142033_*_*.html

For Microsoft .NET Framework 4.6/4.6.1:KB3142037_*_*-Microsoft .NET Framework 4.6/4.6.1-MSP0.txtKB3142037_*_*.html

Restart requirement

This update does not require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart.

Removal information

Click Control Panel, click System and Security, and then under Windows Update, click View installed updates and select from the list of updates.

File information

See the individual Knowledge Base articles that are listed in the “Additional information about this security update” section.

Registry key verification

A registry key does not exist to validate the presence of this update. Use WMI to detect for the presence of this update.

For Microsoft .NET Framework 4.5.2:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework [.NET target version]\KB3142033”ThisVersionInstalled” = “Y”

For Microsoft .NET Framework 4.6/4.6.1:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework 4.6\KB3142037"ThisVersionInstalled" = "Y"

Windows Server 2008 R2 (all editions)

Reference TableThe following table contains the security update information for this software.

Security update file name

For Microsoft .NET Framework 3.5.1 on all supported x64-based editions of Windows Server 2008 R2 Service Pack 1:Windows6.1-KB3142024-x64.msu

For Microsoft .NET Framework 4.5.2 when installed on all supported x64-based editions of Windows Server 2008 R2 Service Pack 1:NDP45-KB3142033-x64.exe

For Microsoft .NET Framework 4.6/4.6.1 when installed on all supported 32-bit editions of Windows 7 Service Pack 1:NDP46-KB3142037-x64.exe

For Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for Itanium-based Systems Service Pack 1:Windows6.1-KB3142024-ia64.msu

Installation switches

See Microsoft Knowledge Base Article 2844699

Update log file

For Microsoft .NET Framework 3.5.1:Not applicable

For Microsoft .NET Framework 4.5.2:KB3142033_*_*-Microsoft .NET Framework [.NET target version]-MSP0.txtKB3142033_*_*.html

For Microsoft .NET Framework 4.6/4.6.1:KB3142037_*_*-Microsoft .NET Framework 4.6/4.6.1-MSP0.txtKB3142037_*_*.html

Restart requirement

This update does not require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart.

Removal information

Click Control Panel, click System and Security, and then under Windows Update, click View installed updates and select from the list of updates.

File information

See the individual Knowledge Base articles that are listed in the “Additional information about this security update” section.

Registry key verification

For Microsoft .NET Framework 3.5.1:A registry key does not exist to validate the presence of this update. Use WMI to detect for the presence of this update.

For Microsoft .NET Framework 4.5.2:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework [.NET target version]\KB3142033”ThisVersionInstalled” = “Y”

For Microsoft .NET Framework 4.6/4.6.1:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework 4.6\KB3142037"ThisVersionInstalled" = "Y"

Windows 8.1 (all editions)

Reference TableThe following table contains the security update information for this software.

Security update file name

For Microsoft .NET Framework 3.5 on Windows 8.1 for 32-bit Systems:Windows8.1-KB3142026-x86.msu

For Microsoft .NET Framework 4.5.2 on Windows 8.1 for 32-bit Systems:Windows8.1-KB3142030-x86.msu

For Microsoft .NET Framework 4.6/4.6.1 on Windows 8.1 for 32-bit Systems:Windows8.1-KB3142036-x86.msu

For Microsoft .NET Framework 3.5 on Windows 8.1 for x64-based Systems:Windows8.1-KB3142026-x64.msu

For Microsoft .NET Framework 4.5.2 on Windows 8.1 for x64-based Systems:Windows8.1-KB3142030-x64.msu

For Microsoft .NET Framework 4.6/4.6.1 on Windows 8.1 for x64-based Systems:Windows8.1-KB3142036-x64.msu

Installation switches

See Microsoft Knowledge Base Article 2844699

Restart requirement

This update does not require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart.

Removal information

Click Control Panel, click System and Security, and then under Windows Update, click View update history and select from the list of updates.

File information

See the individual Knowledge Base articles that are listed in the “Additional information about this security update” section.

Registry key verification

Registry keys do not exist to validate the presence of these updates. Use WMI to detect for the presence of these updates.

Windows Server 2012 and Windows Server 2012 R2 (all editions)

Reference TableThe following table contains the security update information for this software.

Security update file name

For Microsoft .NET Framework 3.5 on Windows Server 2012:Windows8-RT-KB3142025-x64.msu

For Microsoft .NET Framework 4.5.2 on Windows Server 2012:Windows8-RT-KB3142032-x64.msu

For Microsoft .NET Framework 4.6/4.6.1 on Windows Server 2012:Windows8-RT-KB3142035-x64.msu

For Microsoft .NET Framework 3.5 on Windows Server 2012 R2:Windows8.1-KB3142026-x64.msu

For Microsoft .NET Framework 4.5.2 on Windows Server 2012 R2:Windows8.1-KB3142030-x64.msu

For Microsoft .NET Framework 4.6/4.6.1 on Windows Server 2012 R2:Windows8.1-KB3142036-x64.msu

Installation switches

See Microsoft Knowledge Base Article 2844699

Restart requirement

This update does not require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart.

Removal information

Click Control Panel, click System and Security, and then under Windows Update, click View update history and select from the list of updates.

File information

See the individual Knowledge Base articles that are listed in the “Additional information about this security update” section.

Registry key verification

Registry keys do not exist to validate the presence of these updates. Use WMI to detect for the presence of these updates.

Windows RT 8.1 (all editions)

Reference TableThe following table contains the security update information for this software.

Deployment

The 3142030 update is available via Windows Update only.The 3142036 update is available via Windows Update only.

Restart Requirement

A system restart is required after applying this security update.

Removal Information

Click Control Panel, click System and Security, click Windows Update, and then under See also, click Installed updates and select from the list of updates.

File Information

See the individual Knowledge Base articles that are listed in the “Additional information about this security update” section.

Windows 10 (all editions)

Reference TableThe following table contains the security update information for this software.

Security update file name

For all supported 32-bit editions of Windows 10:Windows10.0-KB3156387-x86.msu

For all supported x64-based editions of Windows 10:Windows10.0-KB3156387-x64.msu

For all supported 32-bit editions of Windows 10 Version 1511:Windows10.0-KB3156421-x86.msu

For all supported x64-based editions of Windows 10 Version 1511:Windows10.0-KB3156421-x64.msu

Installation switches

For Microsoft .NET Framework, see Microsoft Knowledge Base Article 2844699

Restart requirement

Yes, you must restart your system after you apply this security update.

Removal information

To uninstall an update installed by WUSA, use the /Uninstall setup switch or click Control Panel, click System and Security, and then under Windows Update, click View installed updates and select from the list of updates.

File information

See Microsoft Knowledge Base Article 3156387See Microsoft Knowledge Base Article 3156421

Registry key verification

Registry keys do not exist to validate the presence of these updates.

Help for installing updates: Support for Microsoft UpdateSecurity solutions for IT professionals: TechNet Security Troubleshooting and SupportHelp for protecting your Windows-based computer from viruses and malware: Virus Solution and Security CenterLocal support according to your country: International Support

Applies toThis article applies to the following:

  • Microsoft .NET Framework 4.6.1 when used with:

    • Windows Server 2012 R2

    • Windows 8.1

    • Windows RT 8.1

    • Windows Server 2012

    • Windows Server 2008 R2 Service Pack 1

    • Windows 7 Service Pack 1

  • Microsoft .NET Framework 4.6 when used with:

    • Windows Server 2012 R2

    • Windows 8.1

    • Windows RT 8.1

    • Windows Server 2012

    • Windows Server 2008 R2 Service Pack 1

    • Windows 7 Service Pack 1

    • Windows Server 2008 Service Pack 2

    • Windows Vista Service Pack 2

  • Microsoft .NET Framework 4.5.2 when used with:

    • Windows Server 2012 R2

    • Windows 8.1

    • Windows RT 8.1

    • Windows Server 2012

    • Windows Server 2008 R2 Service Pack 1

    • Windows 7 Service Pack 1

    • Windows Server 2008 Service Pack 2

    • Windows Vista Service Pack 2

  • Microsoft .NET Framework 3.5.1 when used with:

    • Windows Server 2008 R2 Service Pack 1

    • Windows 7 Service Pack 1

  • Microsoft .NET Framework 3.5 when used with:

    • Windows Server 2012 R2

    • Windows 8.1

    • Windows Server 2012

  • Microsoft .NET Framework 2.0 Service Pack 2 when used with:

    • Windows Server 2008 Service Pack 2

    • Windows Vista Service Pack 2

    • Windows Server 2003 Service Pack 2

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