Word (or Word Viewer) in Microsoft Office 2000 SP3, XP SP3, 2003 SP2, 2004 for Mac, and Works Suite 2004, 2005, and 2006 does not properly handle data in a certain array, which allows user-assisted remote attackers to execute arbitrary code, aka the "Word Array Overflow Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1737
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-024
http://www.vupen.com/english/advisories/2007/1709
http://www.us-cert.gov/cas/techalerts/TA07-128A.html
http://www.securitytracker.com/id?1018013
http://www.securityfocus.com/bid/23804
http://www.securityfocus.com/archive/1/468871/100/200/threaded