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Microsoft's Security Response Center has acknowledged the appearance of proof-of concept code for a vulnerability in Internet Explorer 7.
A Security Response Center blog posting said that Microsoft will investigate the issue immediately.
The proof-of-concept code targets ADODB.Connection, a component of Microsoft's ActiveX software. There are no reports of the vulnerability being actively exploited by attackers.
Following on from last week's false alert [webmasterworld.com], this is the real thing - yet again, an ActiveX vulnerability which affects IE7.