Microsoft has released six security bulletins addressing 12 vulnerabilities in Internet Explorer, Windows, Windows Server, and Office, Cnet has reported. However, experts said that priority should be given to the cumulative IE bulletin, which affects all major Windows versions including Windows 7, IE 6, IE 7, and IE 8. The bulletin fixes five holes that could allow an attacker to remotely take control over a system in drive-by download attacks. The fix also addresses a problem with ActiveX control built with Microsoft Active Template Library (ATL) headers that could allow remote code execution.