VUPEN Vulnerability Research Team discovered a critical vulnerability affecting Microsoft Office Excel. The flaw is caused by a memory corruption error when processing malformed “EntExU2” records in an Excel document, which could be exploited by attackers to execute arbitrary code.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/87103/excel-codeexec.txt
Source: https://packetstormsecurity.com/files/87103/Microsoft-Office-Excel-Record-Processing-Code-Execution.html