In a recent security breach Yahoo! has been the victim of losing around 40,000 user credentials. The company on Thursday issued a statement confirming that on 11 July, an attacker had breached company systems and lifted the data from archived information related to the Yahoo Contributor Network. The information included account information from Yahoo and other services. Yahoo has responded swiftly to address the breach. "We have taken swift action and have now fixed this vulnerability, deployed additional security measures for affected Yahoo users, enhanced our underlying security controls and are in the process of notifying affected users," the company said.