Microsoft Office Excel 2007 SP1 and SP2 and Office 2004 for Mac do not properly parse the Excel file format, which allows remote attackers …

Microsoft Office Excel 2007 SP1 and SP2 and Office 2004 for Mac do not properly parse the Excel file format, which allows remote attackers to execute arbitrary code via a crafted spreadsheet that triggers access of an uninitialized stack variable, aka "Microsoft Office Excel FNGROUPNAME Record Uninitialized Memory Vulnerability."