MS16-112: Description of the security update for Windows lock screen: September 13, 2016

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.

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Method 3: Microsoft Download Center

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

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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

File Information

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File hash information

File name	SHA1 hash	SHA256 hash
Windows8.1-KB3178539-x64.msu	60A85967F423AC37429757D8FBF7212540DEA922	EAB98A9AB742833DD689E07F2C902D81B6F6B09ECF11D21A38CA3B7CA4F2B99A
Windows8.1-KB3178539-x86.msu	BCF957A9F18D52C7D6920CCCAF1967CD91DEF40B	86E1A36A57CD2FA87B46595A15B29ECEAE31FDBF87DFF71D17DD0B4E542F2A46

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File information

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 informationNotes: The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.For all supported x64-based versionsFile 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 versionsFile 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