MS15-116 and MS15-123: Description of the security update for Lync 2013 (Skype for Business): November 10, 2015

Applies to: Microsoft Lync 2013Skype for Business


This security update resolves vulnerabilities in Microsoft Lync 2013 and Skype for Business. These vulnerabilities could allow remote code execution if a user opens a specially crafted document or goes to an untrusted webpage that contains embedded OpenType fonts. Or, these vulnerabilities could allow information disclosure if an attacker invites a user to an instant message session and then sends that user a message that contains specially crafted JavaScript content.

To learn more about the vulnerabilities, see Microsoft Security Bulletin MS15-116 and Microsoft Security Bulletin MS15-123.

Note After you apply this security update, you may see a popup window that states that a website wants to open web content in protected mode in Internet Explorer. See Updates to change the way that Internet Explorer interacts with features in Microsoft Office applications for more information.

More Information

Known issues in this security update

  • After you install this security update, "Lync" is displayed in the title bar of the Contacts list. This issue occurs if you have configured the Skype for Business user interface to display in the Lync 2013 (Skype for Business) client.

    For more information about this issue, click the following article number to view the article in the Microsoft Knowledge Base:
    3121276 Title bar displays "Lync" after you install the November 2015 update for Lync 2013 (Skype for Business 2015)

    Microsoft is researching this problem and will post more information in this article when the information becomes available.

How to obtain and install the update

Method 1: Microsoft Update

This update is available through Microsoft 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 the update, follow the installation instructions on the download page.

More Information

Update deployment information

For deployment information about this update, see Microsoft Knowledge Base article 3104540 and 3105872.


To install this security update, you must first have the following updates installed.

Update replacement information

This security update replaces previously released update 3085500 .