VUPEN Vulnerability Research Team discovered a critical vulnerability affecting Microsoft Office Excel. The vulnerability is caused by a heap overflow error when processing malformed EDG (recType 0x88) and Publisher (recType 0x89) records, which could be exploited by attackers to execute arbitrary code by tricking a user into opening a specially crafted Excel document.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/90526/msexceledg-overflow.txt
Source: https://packetstormsecurity.com/files/90526/Microsoft-Office-Excel-EDG-Heap-Overflow.html