Microsoft is investigating public reports of a remote code execution vulnerability in supported editions of Windows XP and Windows Server 2003 with Windows Internet Explorer 7 installed. This vulnerability does not affect Windows Vista or any supported editions of Windows where Internet Explorer 7 is not installed. We are not aware of attacks that try to use the reported vulnerability or of customer impact at this time.
Review Microsoft Security Advisory 943521 for an overview of the issue, details on affected components, mitigating factors, suggested actions, frequently asked questions (FAQ) and links to additional resources.
Customers in the U.S. and Canada who believe they are affected can receive technical support from Microsoft Product Support Services (http://support.microsoft.com/security) at 1-866-PCSAFETY. There is no charge for support calls that are associated with security updates.
International customers can receive support from their local Microsoft subsidiaries. There is no charge for support that is associated with security updates. For more information about how to contact Microsoft for support issues, visit the International Support Web site (http://support.microsoft.com/common/international.aspx).
Upon completion of this investigation, Microsoft will take the appropriate action to protect our customers, which may include providing a solution through a service pack, our monthly security update release process, or an out-of-cycle security update, depending on customer needs.
- Microsoft Security Advisory 943521 – URL Handling Vulnerability in Windows XP and Windows Server 2003 with Windows Internet Explorer 7 Could Allow Remote Code Execution
- MSRC Blog: Security Advisory 943521
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