Microsoft has announced it will release 4 critical patches on March 11th. All will address remote execution flaws found in Office:

The first bulletin is rated critical for Microsoft Office Excel 2000 and may address an Excel vulnerability discovered in January and left unpatched.

The second bulletin addresses critical vulnerabilities in Microsoft Office Outlook 2000, 2002, 2003 and 2007.

The third bulletin addresses remote code execution vulnerabilities in Microsoft Office 2000 (SP3).

The fourth bulletin from Microsoft covers Web components for Office 2000.

Microsoft also plans to release an updated malware removal tool and several non security yet high priority updates on Windows Server Update and windows update. For more information check out Microsoft TechNet.