Microsoft’s security response team is investigating reports of a potentially dangerous code execution vulnerability in its flagship Internet Explorer browser.

The company warned that an attacker could host a maliciously crafted web page and run arbitrary code if they could convince a user to visit the web page and then get them to press the F1 key in response to a pop up dialog box.

Microsoft’s Jerry Bryant said the company is not aware of any attacks related to this vulnerability.

“We have determined that users running Windows 7, Windows Server 2008 R2, Windows Server 2008, and Windows Vista, are not affected by this issue,” Bryant said.

More: http://blogs.zdnet.com/security/?p=5560