On July 8, Konami discovered numerous access errors through its Konami ID portal site and subsequently commissioned a report. Over 35,252 successful unauthorized logins were uncovered out of nearly four million attempts to gain access – similar to the Club Nintendo Japan hacks
reported last week.
The access was achieved through login information Konami believes leaked from "an external service provider." Konami suggests all users change their passwords as a precaution and will individually contact owners of affected accounts who may have had their username, password, address, telephone number, date of birth and email address information stolen from the third-party leak.
In response to the breach, Konami says it has "strengthened its security and raised its monitoring level, and measures have been taken to ensure that IDs and passwords involved in these unauthorized logins can no longer be used to log in."