Microsoft has released an emergency patch for Windows XP, 7 and 8.1, plugging a critical zero-day vulnerability in its Internet Explorer (IE) web browser that is known to be leaving one in four web users vulnerable to cyber attacks. The vulnerability was discovered by security firm FireEye at the end of April and is known to affect the IE6 to IE11 web browser versions. The vulnerability is particularly dangerous as it affects the older unsupported Windows XP as well as newer Windows 7 and Windows 8.1 versions of Microsoft’s operating system (OS). Microsoft officially ceased support for Windows XP on 8 April, warning users that they would no longer receive security updates for newly discovered vulnerabilities affecting the OS. <more>

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