Based on its initial investigation, Microsoft believes that there is "an issue", according to spokesman with the company's public relations agency.
Secunia is currently unaware of any exploit using this flaw, but claims to be keeping an eye on it. The disclosure of this flaw follows a similar incident last week, where Secunia said it had found a hole in the browser. Microsoft claimed that that particular flaw lay in a component of Microsoft's Outlook Express email client instead, and that the flaw was simply triggered by the browser, rather than technically residing inside the browser itself. Nevertheless, it is clear that the release of IE7 has not drawn a halt to the torrent of security problems facing Windows users.