Description of the security update for Office Online Server : August 11, 2020

Summary

This security update resolves vulnerabilities in Microsoft Office that could allow remote code execution if a user opens a specially crafted Office file. To learn more about these vulnerabilities, see the following security advisories:

• Microsoft Common Vulnerabilities and Exposures CVE-2020-1503
• Microsoft Common Vulnerabilities and Exposures CVE-2020-1583
• Microsoft Common Vulnerabilities and Exposures CVE-2020-1495
• Microsoft Common Vulnerabilities and Exposures CVE-2020-1502
  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.

• Download security update 4484470 for the 64-bit version of Office Online Server

More information

Security update deployment information

For deployment information about this update, see security update deployment information: August 11, 2020.

Security update replacement information

This security update replaces previously released security update 4484451.

File hash information

File name	SHA1 hash	SHA256 hash
wacserver2019-kb4484470-fullfile-x64-glb.exe	0C81CA10FF120F1CB2EC45B1FDB14430E472AF4C	3C26666AA8A4E4B3654C2EB5D26854CDA2C487918C1026DE58BDD9BBADB8F03D

File informationDownload the list of files that are included in security update 4484470.

Information about protection and security

Protect yourself online: Windows Security supportLearn how we guard against cyber threats: Microsoft Security