Microsoft released eleven patches yesterday, with six of them meriting a critical rating.
The critical updates affect the WebDAV Mini-Redirector, Object Linking and Embedding Automation, Microsoft Word, Internet Explorer, Microsoft Office 2000, XP and 2003, and Microsoft Office 2004 for Mac. They all focus on flaws in the programs that could allow remote code execution. Affected systems are those running Windows XP, Windows Vista and Windows Server 2003
The remaining patches, deemed merely "important", address issues in Active Directory, Transmission Control Protocol/Internet Protocol processing, Internet Information Services, and Microsoft Works 8.0 and Suite 2005. The vulnerabilities could allow denial of service, remote code execution, or in one case grant an attacker full control of an affected system.
Microsoft's February patch summary can be found here. ®