Heap-based buffer overflow in Microsoft Office Excel 2007 SP1 and SP2; Office Excel Viewer SP1 and SP2; and Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 and SP2 allows remote attackers to execute arbitrary code via a crafted spreadsheet in which "a MDXTUPLE record is broken up into several records," aka "Microsoft Office Excel MDXTUPLE Record Heap Overflow Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7862
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-017
http://www.us-cert.gov/cas/techalerts/TA10-068A.html
http://www.securitytracker.com/id?1023698
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=862