This indicates an attack attempt against a memory-corruption vulnerability in Microsoft Word.
The vulnerability is caused by an error when the vulnerable software handles a crafted Word file. It allows a remote attacker to execute arbitrary code via sending a crafted Word file.
Microsoft Office Word 2000 Service Pack 3
Microsoft Office Word 2002 Service Pack 3
Microsoft Office 2004 for Mac
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the patch supplied by the vendor: