Word (or Word Viewer) in Microsoft Office 2000 SP3, XP SP3, 2003 SP2, 2004 for Mac, and Works Suite 2004, 2005, and 2006 does not properly handle data in a certain array, which allows user-assisted remote attackers to execute arbitrary code, aka the "Word Array Overflow Vulnerability."
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly.