Microsoft brushed off a dubious hacker's claim on Thursday that he stole 47 million account credentials for Microsoft's Xbox Live gaming service.

A survey of U.S. utilities shows many are facing frequent cyberattacks that could threaten a highly interdependent power grid supplying more than 300 million people, according to a congressional report.

Security researchers found serious vulnerabilities in the engines of several popular first-person shooter video games that could allow attackers to compromise their online servers and the computers of players accessing them.

A recent intrusion on the computer network of Norwegian telecommunications company Telenor was the result of a large cyberespionage operation of Indian origin that for the past few years has targeted business, government and political organizations from different countries, according to researchers from security firm Norman Shark.

The computer virus seems to be making a subtle comeback.

Just 11 days after issuing an advisory, Microsoft has released a patch for a bug in Internet Explorer 8 that bedeviled the U.S. Department of Labor earlier this month.

Adobe has released scheduled security updates for its Reader, Acrobat, Flash Player and ColdFusion products on Tuesday in order to fix many critical vulnerabilities, including one that is already actively exploited by attackers.

Hackers are finding it pays to call ahead before sending malware-laden email.