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-2017-8631, Microsoft Common Vulnerabilities and Exposures CVE-2017-8742, and Microsoft Common Vulnerabilities and Exposures CVE-2017-8743.
Note To apply this security update, you must have the release version of Office Online Server installed on the computer.
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.
Security update deployment information
For deployment information about this update, see security update deployment information: September 12, 2017.
Security update replacement information
This security update doesn't replace any previously released update.
File hash information
Package Hash SHA 1
Package Hash SHA 2
For the list of files that cumulative update KB 3213658 contains, download the file information for update 3213658.
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 SharePoint: SharePoint User Voice portal