OK Savings Bank Data Breach Affects 518 Customers, More Than Doubling

Names, account numbers, product names, balances, interest rates and last transaction dates leaked

OK Savings Bank said on Oct. 16 that the number of customers affected by the recent data breach involving unauthorized and abnormal access to its website had more than doubled, rising from 250 to 518.

OK Savings Bank said that after detecting abnormal access to its loan application webpage on Oct. 12, it blocked suspicious IP addresses and access routes, then conducted a thorough investigation of its systems, including deposit and banking services.

The bank said that during the investigation, it found signs of abnormal access attempts (an attack) on a page related to its mobile deposit services, in addition to the existing loan application webpage, between 3:32 a.m. and 7:34 a.m. on Oct. 15. An urgent investigation confirmed that the personal information of an additional 268 customers had been leaked.

The leaked information included details related to deposit services, such as customers' names, account numbers, product names, balances, interest rates, and dates of their most recent transactions.

OK Savings Bank said it reported the additional leak to the relevant authorities in accordance with the applicable procedures. It also notified affected customers whose information was confirmed to have been leaked in the latest incident by text message and email. The bank plans to provide guidance on preventing secondary 피해 and operate a consultation service.

An OK Savings Bank official said, "We confirmed the leak of additional customer information during a comprehensive reinspection of our systems. We deeply apologize once again for causing concern to customers who have trusted us."

This content was produced with the assistance of AI translation services.