Microsoft Word 2002 SP3 and Office 2004 for Mac do not properly handle unspecified return values during parsing of a Word document, which allows remote attackers to execute arbitrary code via a crafted document that triggers memory corruption, aka "Word Return Value Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6974
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-079
http://www.us-cert.gov/cas/techalerts/TA10-285A.html
http://www.securityfocus.com/archive/1/514295/100/0/threaded