Description of the security update for Skype for Business 2016: October 10, 2017

Applies to: Skype for Business 2016


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 2016 installed on the computer.

Improvements and fixes

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 KB4011040.

File hash information

Package name Package hash SHA 1 Package hash SHA 2
lync2016-kb4011159-fullfile-x64-glb.exe 99B22A61B4A63E85090C8C5620D64B4C99629F6C 75DE77079388A78649C15530EDD6DDACC77757CBC8483B8598722C276639E825
lync2016-kb4011159-fullfile-x86-glb.exe E136B0E6700893602422DDE236972FE7BEA64568 30BF7DAA100A93C43E34D2269339AEDA3E706CCFF61B3B7A98CF92938665644E

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 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.

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