Summary

This security update resolves an information disclosure vulnerability that exists if Microsoft Excel incorrectly discloses the contents of its memory. It also resolves a remote code execution vulnerability that exists in Excel if the software does not correctly handle objects in memory. To learn more about these vulnerabilities, see Microsoft Common Vulnerabilities and Exposures CVE-2020-1218, CVE-2020-1224, and CVE-2020-1335.

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: September 8, 2020.

Security update replacement information

This security update replaces any previously released update 4484481.

File hash information

File name

SHA1 hash

SHA256 hash

WacServer2013-kb4484518-fullfile-x64-glb.exe

AA121AF9D0EB35D74CCAD6EF7BB67B788A0E4352

849FE8E4BE7030088635AA4D6A89BA85D141B863B9AB2F7BC5B1A36D489CC9A4


File information

Download the list of files that are included in security update 4484518.

Information about protection and security

Protect yourself online: Windows Security support

Learn how we guard against cyber threats: Microsoft Security

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