Microsoft Office XP SP3, Office 2004 and 2008 for Mac, Office for Mac 2011, and Open XML File Format Converter for Mac allow remote attackers to execute arbitrary code via a crafted Office document that triggers memory corruption, aka "MSO Large SPID Read AV Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11947
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-087
http://www.vupen.com/english/advisories/2010/2923
http://www.us-cert.gov/cas/techalerts/TA10-313A.html
http://www.securitytracker.com/id?1024705
http://www.securityfocus.com/bid/44660