Windows Media Player 7 Security Patch: OCX Vulnerability eliminates a security vulnerability that lies in Microsoft Windows Media Player 7.0 but primarily affects e-mail applications. The net effect of the vulnerability is that it could enable a malicious user to create an e-mail message, which when closed after being read, could cause the e-mail application to fail. OCX controls are containers that can hold multiple ActiveX controls. A particular OCX control, associated with Windows Media Player, could be used in a denial-of-service attack against RTF-enabled e-mail clients, such as Microsoft Outlook and Outlook Express. If the affected control were programmatically embedded into an RTF e-mail message and then sent to unsuspecting users, their e-mail clients would fail when they closed the message. The vulnerability does not cause any lasting effects. You can resume the normal operation of your e-mail client by restarting it and deleting the affected message.