Microsoft is investigating active, targeted attacks leveraging a potential vulnerability in the ActiveX control for the Snapshot Viewer for Microsoft Access. An attacker could exploit the vulnerability by constructing a specially crafted Web page. The risk is MEDIUM. An attacker could exploit the vulnerability by constructing a specially crafted Web page. When a user views the Web page, the vulnerability could allow remote code execution. An attacker who successfully exploited this vulnerability could gain the same user rights as the logged-on user.