Microsoft today released Microsoft Office 2004 for Mac 11.3.5 Update which “contains several improvements to enhance security and stability, including fixes for vulnerabilities that an attacker can use to overwrite the contents of your computer’s memory with malicious code. In addition, this update includes all the improvements released in all previous Office 2004 updates.”
Microsoft Office 2004 for Mac 11.3.5 Update applies to: Office 2004 Standard Edition, Office 2004 Student and Teacher Edition, Office 2004 Professional Edition, Word 2004, Excel 2004, PowerPoint 2004, Entourage 2004.
Requires Mac OS X 10.2.8 (Jaguar) or later.
More info and download link here.