Attackers controlling entry nodes on the Tor network could find the location of hidden services or unmask users visiting them.

The worst one could allow a remote attacker to change DNS settings.

The tool allowed attackers to try a large number of passwords for Apple ID accounts.

The company believes attackers obtained domain administrator credentials and used them to change the domain's DNS records at the registrar.

South Korean officials have stated that North Korea is to blame for attacks against government websites last month, citing North Korean IP addresses and signature malicious computer codes as evidence. In addition, they say the same group of attackers are also responsible for the attacks last March.

A flaw in Adobe Reader could allow an attacker to see when and where a PDF is opened.

The Japan-based exchange said attackers are seeking to manipulate bitcoin's price.

The DNS records for the affected domain names were modified, suggesting a possible security breach at the .ro registry.

Over 90 percent of data breaches are caused by external attacks, according to a new Verizon report.

An Austrian security vendor has found a vulnerability in Windows Vista that it says could possibly allow an attacker to run unauthorized code on a PC.

The latest version of Oracle Corp.'s flagship database offers better security than earlier versions, but development errors have left vulnerabilities that attackers can use to steal data, an expert warned Monday.

A team of security experts in Baltimore, Md., said it has found a flaw in Apple Inc.'s iPhone handset that can be used by attackers to access private data stored on it.

China has taken over as the world's most botnet-infested country, as the sophistication and danger of cyberattackers continues to grow, according to Symantec.

Google Inc. has closed a potentially major cross-site scripting vulnerability in its Google Desktop software that could have allowed remote attackers to take control of a victim's computer and its contents.

Mozilla Corp. will delay the next security update for Firefox so it can test a fix for a flaw that could be used by attackers by skirt security restrictions.

Microsoft Corp. is investigating reports of a vulnerability in a Windows ActiveX control that could allow an attacker to remotely take control of a computer, according to an advisory issued Friday. One security company rated the vulnerability critical, while Microsoft said it allowed only limited attacks.

Microsoft Corp. has issued nine security updates addressing critical flaws in its Office and Windows products. The updates patch two worrisome PowerPoint flaws that could allow attackers to seize control of a PC, the company said Tuesday.