Description of the security update for Office Online Server: February 9, 2021 (KB4493192)

Summary

This security update resolves a Microsoft Excel Remote Code Execution Vulnerability. To learn more about the vulnerability, 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.

Improvements and fixes

This update contains a fix for the following nonsecurity issue:

  • An Excel document that has the Right-To-Left (RTL) setting enabled can't be scrolled horizontally when it's opened in Google Chrome browsers or Microsoft Edge based on Chromium by using Excel Online.

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.

More information

Security update deployment information

For deployment information about this update, see security update deployment information: February 9, 2021.

Security update replacement information

This security update replaces previously released security update 4493160.

File hash information

File name

SHA1 hash

SHA256 hash

wacserver2019-kb4493192-fullfile-x64-glb.exe

A29670BC07952A17B884855E83F3E3F00AF50082

5A1C4C1A3B9A179C56D17E7CFC1D67627F8A8391E6412C7FBE50E78595FAD756

File information

Download the list of files that are included in security update 4493192.

Information about protection and security

Protect yourself online: Windows Security support

Learn how we guard against cyber threats: Microsoft Security

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