source: http://www.securityfocus.com/bid/43419/info

Microsoft Excel is prone to a memory-corruption vulnerability.

An attacker could exploit this issue to execute arbitrary code in the context of the application. Failed exploit attempts may result in denial-of-service conditions. 

https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/bin-sploits/34698.rar