Microsoft has confirmed a security flaw affecting Internet Explorer is currently being used by hackers, but that it has no immediate plans to fix. In a late-evening tweet, US-CERT, the division of Homeland Security tasked with reporting on major security flaws, tweeted a link to a security advisory detailing the bug, describing it as “being exploited in the wild.” Microsoft said all supported versions of Windows are affected by the flaw, including Windows 7, which after this week no longer receives security updates. The vulnerability was found in how Internet Explorer handles memory.