During patch Tuesday Microsoft released two security patches for Skype for Business and one for Lync 2013.
Security update for Skype for Business 2016
Summary
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-2017-0283.
**Note** To apply this security update, you must have the release version of Skype for Business 2016 installed on the computer.
Security update for Skype for Business 2015 (Lync 2013)
Summary
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-2017-0283.
**Note** To apply this security update, you must have the release version of Skype for Business 2015 (Lync 2013) installed on the computer.
Improvements and fixes
This security update contains improvements and fixes:
* [Can’t upload a file in a persistent chat room by selecting the “send” button in Skype for Business 2015 (Lync 2013)](https://support.microsoft.com/en-us/help/4023594)
* [Skype for Business 2015 (Lync 2013) crashes when you sign in to the client](https://support.microsoft.com/en-us/help/4023595)
* [Update to join a conference meeting without an audio device in Skype for Business 2015 (Lync 2013)](https://support.microsoft.com/en-us/help/4023597)/