Description of the security update for Skype for Business 2015 (Lync 2013): October 10, 2017

Si applica a: Microsoft Lync 2013Skype for BusinessSkype for Business 2015


This security update resolves vulnerabilities in Microsoft Office that could allow remote code execution if a user opens a specially crafted Office file. To learn more about these vulnerabilities, see Microsoft Common Vulnerabilities and Exposures CVE-2017-11786.

Note To apply this security update, you must have the release version of Skype for Business 2015 (Lync 2013) installed on the computer.

How to get and install the update

Method 1: Microsoft Update

This update is available from Microsoft 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 Windows Update: FAQ.

Method 2: Microsoft Update Catalog

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

Method 3: Microsoft Download Center

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

More Information

Security update deployment information

For deployment information about this update, see security update deployment information: October 10, 2017.

Security update replacement information

This security update replaces previously released security update KB 4011107.


File hash information

Package name Package hash SHA 1 Package hash SHA 2
lync2013-kb4011179-fullfile-x64-glb.exe DDFC5E4493FEFDD4A1D3AD8D836B66D03E08E87A CFC62FABB9D8C5F45C559398086CB28DC11395831883B80DCC471B09BF2C20FF
lync2013-kb4011179-fullfile-x86-glb.exe 7816ABD0DF8D0202CA1702A8C4A24178B30CD4B9 A215070DD7D58A2F2651FF8C585CDF488ABD65283DE2041843C34D0B568F28EA

File information

The English version of this security update has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and 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 times may change when you perform certain operations on the files.

How to get help and support for this security update

Help for installing updates: Windows Update FAQ

Security solutions for IT professionals: Security Support and Troubleshooting

Help for protecting your Windows-based computer from viruses and malware: Microsoft Secure

Local support according to your country: International Support

Propose a feature or provide feedback on Skype: Skype User Voice portal