This indicates an attempt to exploit a memory-corruption vulnerability in
The vulnerability is caused by a design error that occurs when the vulnerable software handles an XLS file that includes malicious records. A remote attacker may exploit this to execute arbitrary code.
Microsoft Office Excel 2007 Service Pack 1
Microsoft Office Excel 2007 Service Pack 2
Microsoft Office Excel Viewer
Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats Service Pack 1 and Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats Service Pack 2
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply patch, available from the web site: