This security update resolves a security feature bypass vulnerability that exists in Microsoft Outlook software if it incorrectly handles the parsing of URI formats. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2020-0696.
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
- Adds the ability to prevent Outlook from connecting to a mailbox that uses basic authentication by using the DisableBasic registry key that's located in HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Outlook\HTTP. To prevent basic authentication, set the value to 1. The default value is 0. If this value is set to 1, and if the mailbox supports only basic authentication, Outlook cannot connect to the mailbox.
- Large blank spaces appear between the first and second columns in the contact item after an East Asian language pack is applied to Outlook.
- Outlook may stop responding when you create a rule from a Skype for Business "missed conversation" message.
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.
Security update deployment information
For deployment information about this update, see security update deployment information: February 11, 2020.
Security update replacement information
This security update replaces previously released security update 4475553.
File hash information
|File name||SHA1 hash||SHA256 hash|
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.