Heap-based buffer overflow in Microsoft Office Excel 2007 SP1 and SP2; Office Excel Viewer SP1 and SP2; and Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 and SP2 allows remote attackers to execute arbitrary code via a crafted spreadsheet in which "a MDXTUPLE record is broken up into several records," aka "Microsoft Office Excel MDXTUPLE Record Heap Overflow Vulnerability."