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Summary

This update resolves vulnerabilities in the Microsoft .NET Framework. The most severe of these vulnerabilities could allow elevation of privilege if an attacker injects a client-side script into a user's browser. To learn more about this vulnerability, see Microsoft Security Bulletin MS15-118.

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 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 3098786

Update deployment information

For deployment information about this update, see Microsoft Knowledge Base article 3104507.

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 replaces previously released update 3095098.


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 of systems

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.6.115.0

41,136

01-Oct-2015

23:12

aspnet_wp.exe

4.6.115.0

42,664

01-Oct-2015

23:12

System.Web.ApplicationServices.dll

4.6.115.0

62,200

01-Oct-2015

22:27

System.Web.Extensions.dll

4.6.115.0

1,840,344

01-Oct-2015

22:27

System.Web.dll

4.6.115.0

5,346,480

01-Oct-2015

22:27

webengine.dll

4.6.115.0

24,744

01-Oct-2015

23:12

webengine4.dll

4.6.115.0

511,144

01-Oct-2015

23:12

msvcr120_clr0400.dll

12.0.52512.0

987,848

01-Oct-2015

23:12

For all supported x64-based versions of systems

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.6.115.0

45,232

01-Oct-2015

23:26

Aspnet_perf.dll

4.6.115.0

41,136

01-Oct-2015

23:12

aspnet_wp.exe

4.6.115.0

47,784

01-Oct-2015

23:26

aspnet_wp.exe

4.6.115.0

42,664

01-Oct-2015

23:12

System.Web.ApplicationServices.dll

4.6.115.0

62,200

01-Oct-2015

22:27

System.Web.Extensions.dll

4.6.115.0

1,840,344

01-Oct-2015

22:27

System.Web.dll

4.6.115.0

5,335,216

01-Oct-2015

23:26

System.Web.dll

4.6.115.0

5,346,480

01-Oct-2015

22:27

webengine.dll

4.6.115.0

26,280

01-Oct-2015

23:26

webengine.dll

4.6.115.0

24,744

01-Oct-2015

23:12

webengine4.dll

4.6.115.0

622,256

01-Oct-2015

23:26

webengine4.dll

4.6.115.0

511,144

01-Oct-2015

23:12

msvcr120_clr0400.dll

12.0.52512.0

993,632

01-Oct-2015

23:26

msvcr120_clr0400.dll

12.0.52512.0

987,848

01-Oct-2015

23:12


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 toThis article applies to the following:

  • Microsoft .NET Framework 4.6 and 4.6 RC 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

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