Summary

This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow elevation of privilege if Windows improperly allows web content to load from the Windows lock screen.

To learn more about the vulnerability, see Microsoft Security Bulletin MS16-112.

More Information

Important

  • All future security and non-security 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.

How to obtain and install the 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.

Note For Windows RT 8.1, this update is available through Windows Update only.

Method 2: Microsoft Update Catalog

To get the stand-alone package for this update, go to the Microsoft Update Catalog website.

You can obtain the stand-alone update package through the Microsoft Download Center. Follow the installation instructions on the download page to install the update.

Click the download link in Microsoft Security Bulletin MS16-112 that corresponds to the version of Windows that you are running.

More Information

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

File Information

File name

SHA1 hash

SHA256 hash

Windows8.1-KB3178539-x64.msu

60A85967F423AC37429757D8FBF7212540DEA922

EAB98A9AB742833DD689E07F2C902D81B6F6B09ECF11D21A38CA3B7CA4F2B99A

Windows8.1-KB3178539-x86.msu

BCF957A9F18D52C7D6920CCCAF1967CD91DEF40B

86E1A36A57CD2FA87B46595A15B29ECEAE31FDBF87DFF71D17DD0B4E542F2A46


The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.

Windows 8.1 and Windows Server 2012 R2 file information

Notes: The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.

For all supported x64-based versions

File name

File version

File size

Date

Time

Platform

Pnidui.dll

6.3.9600.18437

627,200

11-Aug-2016

16:17

x64

Pnidui.ptxml

Not applicable

1,495

22-Aug-2013

06:47

Not applicable

Wwanconn.dll

8.1.9600.18437

455,680

11-Aug-2016

16:16

x64

Wwanmm.dll

8.1.9600.18437

1,156,608

11-Aug-2016

16:26

x64

Wwanpref.dll

8.1.9600.17415

50,688

29-Oct-2014

02:17

x64

Wwanui.ptxml

Not applicable

3,237

22-Aug-2013

06:58

Not applicable

For all supported x86-based versions

File name

File version

File size

Date

Time

Platform

Pnidui.dll

6.3.9600.18437

572,928

11-Aug-2016

15:48

x86

Pnidui.ptxml

Not applicable

1,495

21-Aug-2013

23:42

Not applicable

Wwanconn.dll

8.1.9600.18437

373,760

11-Aug-2016

15:47

x86

Wwanmm.dll

8.1.9600.18437

1,119,232

11-Aug-2016

15:52

x86

Wwanpref.dll

8.1.9600.17415

41,984

29-Oct-2014

01:38

x86

Wwanui.ptxml

Not applicable

3,237

21-Aug-2013

23:54

Not applicable


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