Ubisoft has announced that a security breach of its Uplay servers has resulted in unauthorized access of user data. Hackers were able to gain access to user names, e-mail addresses, and encrypted passwords. Fortunately, payment data is stored on a different server that Ubisoft says wasn't compromised. An official statement from the company said, "We instantly took steps to close off this access, to begin a thorough investigation with relevant authorities, internal and external security experts, and to start restoring the integrity of any compromised systems." Users that have an account with the Uplay service should change their passwords, as well as any site that shares login information with it.
Source: Venture Beat