Microsoft is to issue an out-of-cycle patch for Internet Explorer (IE) to fix a number of critical software issues.
The company said in a security advisory that the flaws affect IE6 and IE7, and that users of IE8 and Windows 7 are not vulnerable. It is believed to be the same problem identified by an Israeli researcher earlier in the month.
"The out-of-band security bulletin is a cumulative security update for IE and will also contain fixes for privately reported vulnerabilities rated 'critical' on all versions of IE that are not related to this attack," said the company.
The patch, which will require a reboot once installed, is Microsoft's second this year issued outside the traditional monthly Patch Tuesday schedule. Microsoft has not said whether exploits have been seen online.
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