A remote code execution vulnerability exists in Microsoft Outlook software when it fails to properly handle objects in memory, aka 'Microsoft Outlook Remote Code Execution Vulnerability'.
https://www.tenable.com/blog/tenable-roundup-for-microsoft-s-august-2019-patch-tuesday-dejablue
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1200