Description of the security update for Office Online Server: December 11, 2018

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-2018-8627 and Microsoft Common Vulnerabilities and Exposures CVE-2018-8628.

Note To apply this security update, you must have the release version of Office Online Server installed on the computer.

Method 1: Microsoft Update

This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to turn on automatic updating, see Windows Update: FAQ.

Method 2: Microsoft Update Catalog

To get the standalone package for this update, go to the Microsoft Update Catalog website.

Method 3: Microsoft Download Center

You can get the standalone update package through the Microsoft Download Center. Follow the installation instructions on the download page to install the update.

• Download security update 4011027 for the 64-bit version of Office Online Server

Security update deployment information

For deployment information about this update, see security update deployment information: December 11, 2018.

Security update replacement information

This security update doesn't replace any previously released security update.

File hash information

File information

For the list of files that are included in the security update 4011027, download the file information.

Protect yourself online and at home: Windows Security support 

Help for protecting your Windows-based computer from viruses and malware: Microsoft Secure

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