Microsoft Office 2007 SP3, Office 2010 SP2, Word Viewer, Office for Mac 2011, and Office 2016 for Mac allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted document, aka "Microsoft Office Memory Corruption Vulnerability."
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-148