A critical vulnerability has been identified in Microsoft Internet Explorer, which could be exploited by remote attackers to execute arbitrary commands. This flaw is due to a memory corruption error when processing malformed HTML pages containing specially crafted calls to JavaScript "window()" objects and "onload" events, which could be exploited remote attackers to take complete control of an affected system by convincing a user to visit a malicious Web page.
This vulnerability has been confirmed on Windows XP SP2 with Internet Explorer 6 (fully patched).
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