KB Kookmin Bank says data leak hits 99 customers, 20 staff
KB•KB Kookmin Bank said a Sept. 30, 2026, data leak affected 99 customers and exposed personal data for 20 current and former employees. The bank said the incident involved an internal employee mobile support platform, not internet banking or customer transaction channels.
1. Data and systems affected
The exposed data included contact details and encrypted identifiers; some records also contained credit grades, income, and loan or deposit balances. The bank shut down affected systems and servers to block access paths, citing heightened fraud risks such as phishing.
