Microsoft released a patch
for Office 2004 for Mac today which, 'fixes vulnerabilities in Microsoft Office 2004 for Mac that an attacker can use to overwrite the contents of your computer's memory with malicious code. This update also fixes issues in Microsoft Entourage 2004 for Mac and includes all of the improvements released in all previous Office 2004 updates.'
If you're using Entourage with an Exchange account like I am (don't judge me!) be sure to read all the directions as this update may cause some data loss if not installed correctly.