Microsoft Office Excel 2002 SP3, Office 2004 and 2008 for Mac, and Open XML File Format Converter for Mac allow remote attackers to execute arbitrary code via a spreadsheet containing a malformed object that triggers memory corruption, related to "loading Excel records," aka "Excel Document Parsing Memory Corruption Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6265
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-067