Experts at SophosLabs have raised their threat level to "High" in response to an as-yet unpatched security vulnerability in Internet Explorer.
The zero day threat, which was uncovered at the weekend and impacts most versions of Windows, has already resulted in the German government advising users to stop using Internet Explorer.
The rise in the SophosLabs internet threat barometer comes in response to in-the-wild detections that the team has seen in attacks exploiting the CVE-2012-4969 vulnerability in Microsoft's popular web browser.