This security update resolves a remote code execution vulnerability that exists in Microsoft Word software if the program does not correctly handle objects in memory. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2019-1034 and Microsoft Common Vulnerabilities and Exposures CVE-2019-1035.
Note To apply this security update, you must have the release version of Microsoft Office Online Server installed on the computer.
Known issues in this update
After you install this security update, Office Online Server logging will be set to Verbose by default. We recommend that you change this setting to Medium by running the following command:
Set-OfficeWebAppsFarm -LogVerbosity “Medium”
Note After you run the command, you have to restart the Office Online Service. To do this, run the following command:
Improvements and fixes
This security update contains a fix for the following nonsecurity issue:
Word documents cannot be viewed on mobile browsers in Office Online servers for certain language locales.
How to get and install the update
Method 1: Microsoft Update
This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to turn on automatic updating, 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 stand-alone update package through the Microsoft Download Center. Follow the installation instructions on the download page to install the update.
Security update deployment information
For deployment information about this update, see security update deployment information: June 11, 2019.
Security update replacement information
This security update replaces previously released security update 4462169.
File hash information
How to get help and support for this security update
Help for installing updates: Protect yourself online
Help for protecting your Windows-based computer from viruses and malware: Microsoft Security
Local support according to your country: International Support