The breach, which Capcom said it detected on October 19, involved unauthorized access to its shared account system used for web services and online games. Exposed data includes email addresses, account creation dates, last login timestamps, number of logins, and the IP address used at the last login.
For a small subset of 43 accounts, additional information such as dates of birth, gender, nicknames, and countries was also exposed. Capcom reported that for another 196 accounts, hackers changed the login passwords in an attempt to lock owners out, but the company reset them. The gaming firm emphasized that passwords for all other registered members were not exposed and that credit card information remained unaffected.
An investigation was launched immediately after the detection, and by October 20, it was clear that customer information had been compromised. The following day, Capcom reported the incident to the police and Japan's Personal Information Protection Commission.
Capcom stated that its online services remain unaffected, but urged users to remain vigilant for unsolicited communications requesting additional information or containing URLs and attachments. The company said it identified the intrusion method and implemented security measures to prevent similar incidents, though it shared no details about how the attackers gained initial access.
Affected customers will be notified in stages, likely due to the large number of accounts involved. Capcom has established region-specific communication channels for support requests.
This is not the first security incident for the company. In November 2020, Capcom suffered an attack claimed by the Ragnar Locker ransomware gang, in which attackers said they stole 1 TB of data. The company later warned that up to 390,000 people could be affected, and disclosed in April 2021 that the attackers had gained access through an old VPN device.
