The software maker issued a patch on Thursday to fight malicious software that was used in the attack on Google Inc and dozens of other companies which operate in China.
Research firm Core Security Technologies said on Friday that it discovered another set of vulnerabilities in Internet Explorer that hackers can link together and exploit, to remotely access all of the data on a personal computer.
"There are three or four ways to conduct this type of attack," said Jorge Luis Alvarez Medina, a security consultant with Boston-based Core, who will demonstrate the vulnerability at the Black Hat security conference in Washington, which begins February 2.