Description of the security update for Office Online Server: July 11, 2023 (KB5002421)

Summary

This security update resolves a Microsoft Excel information disclosure vulnerability. To learn more about the vulnerability, see ​​Microsoft Common Vulnerabilities and Exposures CVE-2023-33162.

Notes:

• This is build 16.0.10400.20000 of the security update package.
• 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. To install the update, follow the installation instructions on the download page.

• Download security update 5002421 for the 64-bit version of Office Online Server

More information

Security update deployment information

For deployment information about this update, see Deployments - Security Update Guide.

Security update replacement information

This security update replaces previously released security update 5002401.

File hash information

File name	SHA256 hash
wacserver2019-kb5002421-fullfile-x64-glb.exe	710F6B57CC720234DDBECA99C48435DE0DF4AE6568E5A031476442DBD36F7FBF

File information

Download the list of files that are included in security update 5002421.

Information about protection and security

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