A Security Update has been released for Outlook 2016. It resolves the following vulnerability;
- CVE-2020-1349: Microsoft Outlook Remote Code Execution Vulnerability
A remote code execution vulnerability exists in Microsoft Outlook software when it fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could use a specially crafted file to perform actions in the security context of the current user. For example, the file could then take actions on behalf of the logged-on user with the same permissions as the current user.
To exploit the vulnerability, a user must open a specially crafted file with an affected version of Microsoft Outlook software. In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file.
Note that the Preview Pane is an attack vector for this vulnerability.
The security update addresses the vulnerability by correcting how Microsoft Outlook handles files in memory.
This update also contains 4 additional fixes or improvements for non-security issues;
- 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.
Note: This update can be installed via Microsoft Update and updates Outlook to version 16.0.5017.1000. This update does not apply to Perpetual and Office 365 based installations of Office 2016.