Stack-based buffer overflow in Excel in Microsoft Office 2000 SP3 and Office XP SP3 allows remote attackers to execute arbitrary code via a crafted Excel file with a malformed record object, aka "String Copy Stack-Based Overrun Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6273
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-021
http://www.vupen.com/english/advisories/2009/1540
http://www.us-cert.gov/cas/techalerts/TA09-160A.html