Netmarble security incident history
Hacking, data breaches and other security incidents involving Netmarble, with related coverage.
Netmarble PC game portal hack leaks personal data of 6.11 million people
6.1mImpact: Personal data of 6.11 million people plus 8,048 additional leaked records, including 1,304 resident registration numbers among the additional data
In November 2025, a hack of Netmarble's PC game portal revealed a leak of personal data belonging to customers, PC bang (internet café) owners, employees and others, with the number of victims confirmed at 6.11 million. A subsequent investigation found that an additional 8,048 records of personal data belonging to customer service enquirers, job applicants, business proposal contacts and others had been leaked, including 1,304 resident registration numbers. Netmarble advised users to change their passwords and apologised, and a fine was finalised over its reporting of the incident three days after becoming aware of it.
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