Description of the security update for Outlook 2016: July 14, 2020

Applies to: Outlook 2016


This security update resolves a remote code execution vulnerability that exists in Microsoft Outlook software if the software does not correctly handle objects in memory. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2020-1349.

Note To apply this security update, you must have the release version of Outlook 2016 installed on the computer.

Be aware that the update in the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2016. It doesn't apply to the Office 2016 Click-to-Run editions, such as Microsoft Office 365 Home (see What version of Office am I using?).

Improvements and fixes

This security update contains the following improvements and fixes:
  • Improves translations in the German version of Outlook 2016.
  • Fixed: Internet Message Access Protocol (IMAP) users see Outlook stop syncing new email messages until they restart Outlook.
  • Fixed: Users who are changing items on a manager's shared calendar may receive the following error message: "The operation cannot be performed because the message has been changed."
  • Fixed: Users experience crashes when they open .msg and .oft files after they apply a recent Windows update.

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: July 14, 2020.

Security update replacement information

This security update replaces previously released security update 4484274.

File hash information

File name SHA1 hash SHA256 hash
outlook2016-kb4484433-fullfile-x86-glb.exe 83C40FC6220C5E23A69DE574ED43C0A12C8E0AA1 8D6D7976431EADD2D6FCCD77CEC5C68F3CEE1857691B0FC9A58313C18C482CEB
outlook2016-kb4484433-fullfile-x64-glb.exe A22A8955FFB0F493A45DFE203C6533C22A78564C 7128AA0B4C560FEE8EE0597BA1D439B3332ECD63BA424221AD6C02EF6D091596

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and times may change when you perform certain operations on the files.

Information about protection and security

Protect yourself online: Windows Security support

Learn how we guard against cyber threats: Microsoft Security