'Critical' Security Flaw Found In Internet Explorer

Microsoft is warning of a "critical" security flaw in Internet Explorer. Hackers could use the vulnerability, called "iFrame," to put software on an infected computer's hard drive.

The bulletin states: "If a user is logged on with administrative privileges, an attacker who successfully exploited this vulnerability could take complete control of an affected system, including installing programs; viewing, changing, or deleting data; or creating new accounts with full privileges. Users whose accounts are configured to have fewer privileges on the system would be at less risk than users who operate with administrative privileges."

Patches have been posted on Microsoft's site.