Microsoft Internet Explorer 5.5 SP1 Security Patch Certificate Validation

From Microsoft:

This update resolves several security vulnerabilities in Internet Explorer 5.5 Service Pack 1 (SP1), and is discussed in Microsoft Security Bulletins MS01-015 and MS01-027. It also includes a previously released update, which is discussed in Microsoft Security Bulletin MS01-020. Download now to eliminate multiple certificate validation vulnerabilities and to prevent a malicious Web site operator from running programs on your computer via HTML Help (.chm) files, and executable e-mail attachments, and to prevent malicious Web site operators from making it appear that the content from his or her Web site actually originated from another site, even a trusted or secure Web site.