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.
Note To apply this security update, you must have the release version of Service Pack 1 for Microsoft Office Web Apps Server 2013 installed on the computer.
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.
Security update deployment information
For deployment information about this update, see Microsoft Knowledge Base article KB3170008.
Security update replacement information
This security update replaces previously released security update KB3115170.
File hash information
Package Hash SHA 1
Package Hash SHA 2
For a list of the files that are provided in this cumulative security update KB3115289, download the file information for update KB3115289.
Help for installing updates:
Support for Microsoft Update
Security solutions for IT professionals:
TechNet Security Troubleshooting and Support
Help for protecting your Windows-based computer from viruses and malware:
Virus Solution and Security Center
Local support according to your country: International Support