A new version of MyDoom uses an unpatched flaw in Microsoft's Internet Explorer to spread, antivirus companies warned on Monday.
The recently discovered vulnerability in the browser software allows the offshoot to infect a PC after a user clicks on a link, according to advisories from security software makers Symantec and McAfee. The program sneaks past antivirus applications that detect malicious software by scanning e-mail messages with attached programs.
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