Microsoft Excel in Office 2000 SP3, Office XP SP3, Office 2003 SP2, and Office 2004 for Mac allows remote attackers to execute arbitrary code via a Workspace with a certain index value that triggers memory corruption.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A2149
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-044
http://www.vupen.com/english/advisories/2007/2868
http://www.us-cert.gov/cas/techalerts/TA07-226A.html
http://www.securitytracker.com/id?1018561