Microsoft Rushes to Fix Security Flaw in Explorer Browser

Microsoft Corp. is rushing to fix a security flaw in its Internet Explorer browser that is already being used in “limited, targeted attacks,” as antivirus firms and the U.S. government advise switching to alternate products.

To take over a user’s personal computer through the browser’s vulnerability, a hacker would have to persuade that person to click on a link to view a malicious website, Microsoft said in an advisory.