Reports indicate that Sony's PlayStation Network password reset page has been hacked, enabling attackers to change the account password using only date of birth and PSN account email - both previously obtained in the PSN attack on April 20.
"I would suggest that you secure your accounts now by creating a completely new email that you will not use ANYWHERE ELSE, and switching your PSN account to use this new email," the site recommends.
"You risk having your account stolen, when this hack becomes more public, if you do not make sure that your PSN account's email is one that cannot be affiliated with or otherwise traced to you."
Sony has removed PSN sign-in from its websites, including PlayStation.com and the PlayStation forums.
"Unfortunately this also means that those who are still trying to change their password via Playstation.com or Qriocity.com will be unable to do so for the time being," Sony said. "This is due to essential maintenance and at present it is unclear how long this will take.
Users remain able to sign into PSN via a PS3 or PSP.