Sony recently stated that an attack on its PlayStation Network may have exposed up to 70 million customers' user names, addresses, passwords and credit card numbers.

"In short, if you have a PlayStation account, your name, address, email, birthday, user name and password have been compromised, and if you gave Sony a credit card number to fund your account, that and the card’s expiration date may also may have been taken (Sony says no card security codes were lost)," writes Krebs on Security's Brian Krebs.

"Obviously, this becomes a much bigger problem for users who have ignored advice about how to choose and use passwords: If you are a Sony customer and picked a password for your PlayStation account that matched the password for the email account you used to register at Sony, change your email password now," Krebs writes.

Go to "Millions of Passwords, Credit Card Numbers at Risk in Breach of Sony Playstation Network" to read the details.

For regular security news updates, follow eSecurityPlanet on Twitter: @eSecurityP.