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 Security Bulletin MS16-088.
For a complete list of affected versions of Microsoft Office software, see Microsoft Knowledge Base article KB3170008.
Improvements and fixes
This security update contains improvements and fixes for the following nonsecurity issues:
Custom fonts can't be applied for PowerPoint Web App and Excel Web App.
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 the "Turn on automatic updating in Control Panel" section of this Safety & Security Center article.
Method 2: 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.