Description of the security update for Office Online Server: December 8, 2020

Summary

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 the following security advisories:

Note To apply this security update, you must have the release version of Microsoft 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 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 4486750 for the 64-bit version of Office Online Server

More information

Security update deployment information

For deployment information about this update, see security update deployment information: December 8, 2020.

Security update replacement information

This security update replaces previously released security update 4486713.

File hash information

File name	SHA1 hash	SHA256 hash
wacserver2019-kb4486750-fullfile-x64-glb.exe	B72B79CA13C10A34315C8518EC2EF4D3C4813A03	4EE016FC93D01B28B8EAB608DE2765031C9B4031624F596C06E2731C580F87D8

File information

Download the list of files that are included in security update 4486750.

Information about protection and security

Protect yourself online: Windows Security support

Learn how we guard against cyber threats: Microsoft Security