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 Service Pack 1 for Microsoft Office Web Apps Server 2013 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: March 9, 2021 (KB5001208).

Security update replacement information

This security update replaces previously released security update 4493204.

File hash information

File name

SHA1 hash

SHA256 hash

WacServer2013-kb4493234-fullfile-x64-glb.exe

C580BAFE987AB0C8958684D70EAB814C8E4BCFBD

0A98150A1BBDB49F822B9209CC5E73D88B8F6B85EA501287A1A8BA3329DB445E

File information

Download the list of files that are included in security update 4493234.

Information about protection and security

Protect yourself online: Windows Security support

Learn how we guard against cyber threats: Microsoft Security

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