Microsoft has updated Microsoft Security Advisory (2219475): Vulnerability in Windows Help and Support Center Could Allow Remote Code Execution

Microsoft is investigating new public reports of a possible vulnerability in the Windows Help and Support Center function that is delivered with supported editions of Windows XP and Windows Server 2003. This vulnerability could allow remote code execution if a user views a specially crafted Web page using a Web browser or clicks a specially crafted link in an e-mail message. Microsoft is aware that proof-of-concept exploit code has been published for the vulnerability. Microsoft is also aware of limited, targeted active attacks that use this exploit code. Based on the samples analyzed, Windows Server 2003 systems are not currently at risk from these attacks. Microsoft is actively monitoring this situation to keep customers informed and to provide customer guidance as necessary.
We are actively working with partners in our Microsoft Active Protections Program (MAPP) to provide information that they can use to provide broader protections to customers.

Upon completion of this investigation, Microsoft will take the appropriate action to help protect our customers. This may include providing a security update through our monthly release process or providing an out-of-cycle security update, depending on customer needs.

  Microsoft Security Advisory (2219475): Vulnerability in Windows Help and Support Center Could Allow Remote Code Execution