Summary

This security update resolves a Microsoft Excel remote code execution vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2021-43256.

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.

More information

Security update deployment information

For deployment information about this update, see Security update deployment information: December 14, 2021 (KB5008541).

Security update replacement information

This security update replaces previously released security update 5002053.

File hash information

File name

SHA256 hash

wacserver2019-kb5002097-fullfile-x64-glb.exe

58BA18EF1FC33A7BBD74EE896FB1E089D2CFE51F2EE06A0010FE2FE9F6135B97

File information

Download the list of files that are included in security update 5002097.

Information about protection and security

Protect yourself online: Windows Security support

Learn how we guard against cyber threats: Microsoft Security

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