Microsoft Office 2010 SP2, Word 2007 SP3, Word 2010 SP2, Word for Mac 2011, Word 2016 for Mac, and Word Viewer allow remote attackers to execute arbitrary code via a crafted file, aka "Microsoft Office Memory Corruption Vulnerability."
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-099