Microsoft says Internet Explorer bug is present in versions 6 to 11 - which dominate 55 percent of PC browser market
Windows XP will not receive any updates - though between 15 and 25 percent of world's PCs use it
Attacks are currently against U.S.-based defense and financial sector firms
By REUTERS
PUBLISHED: 18:37 EST, 27 April 2014 | UPDATED: 19:21 EST, 27 April 2014
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Microsoft Corp is rushing to fix a bug in its widely used Internet Explorer web browser after a computer security firm disclosed the flaw over the weekend, saying hackers have already exploited it in attacks on some U.S. companies.
Microsoft disclosed on Saturday its plans to fix the bug, which targets Internet Explorer versions 9 through 11.
Those versions take up 26.25 percent of the browser market, according to FireEye, the cybersecurity software company that caught the bug.
The bug, however, reportedly affects versions 6 through 11. Together, those versions dominate desktop browsing, accounting for 55 percent of the PC browser market, according to tech research firm NetMarketShare.
Clean-up: Microsoft is rushing to fix a bug in its widely used Internet Explorer web browser after a computer security firm disclosed the flaw over the weekend
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Clean-up: Microsoft is rushing to fix a bug in its widely used Internet Explorer web browser after a computer security firm disclosed the flaw over the weekend
PCs running Windows XP will not receive any updates fixing that bug when they are released, however, because Microsoft stopped supporting the 13-year-old operating system earlier this month.
Security firms estimate that between 15 and 25 percent of the world's PCs still run Windows XP.


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