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 ADV170020.
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
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: November 14, 2017.
Security update replacement information
This security update replaces the previously released update 3213659.
File hash information
Package hash SHA 1
Package hash SHA 2
For the list of files that cumulative update 4011020 contains, download the file information for update 4011020.
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