Description of the security update for Office Online Server: March 14, 2023 (KB5002356)

Summary

This security update resolves a Microsoft Excel denial of service vulnerability and Microsoft Excel remote code execution vulnerability. To learn more about the vulnerabilities, see the following security advisories:​​​​

• Microsoft Common Vulnerabilities and Exposures CVE-2023-23396
• Microsoft Common Vulnerabilities and Exposures CVE-2023-23399

Notes:

• This is build 16.0.10396.20000 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 5002356 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 5002309.

File hash information

File name	SHA256 hash
wacserver2019-kb5002356-fullfile-x64-glb.exe	00625C1B551ED4ED5DC8ED11C8D4307D9ABF4A8296D861481F87ED67066E91D5

File information

Download the list of files that are included in security update 5002356.

Information about protection and security

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