On its official blog, Sony has disclosed
that PlayStation Store users' personal information may have been subject to unauthorized access through the recently launched PC version of the Store.
The company says that there is a possibility, "although unlikely," that a small percentage of PSN users may have had their passwords changed through the unauthorized access, and may have had their personal accounts viewed or used.
PSN accounts do not display entire credit card numbers, Sony notes, and states that "any unauthorized access to your PlayStation Network account is very unlikely to compromise your credit card number."
Sony says it has investigated the issue and is contacting potentially affected customers directly. Sony also urged users to sign into their accounts and check that they are intact, stating, "We have taken immediate measures to rectify this issue and system security is restored."