KB Kookmin Bank Data Breach Expands, Affecting 2,091 Customers and Employees

By Hong Seungwan Posted : October 26, 2026, 18:12 Updated : October 26, 2026, 18:12

KB Kookmin Bank has reported that the number of individuals affected by its data breach has increased from 119 to 2,210. This rise follows a detailed analysis of the existing breach, which confirmed that the personal information of an additional 2,091 customers and employees was compromised.

On October 26, KB Kookmin Bank stated that it verified this information in collaboration with regulatory authorities and relevant organizations by meticulously re-examining the data and processing systems involved in the initial incident. The newly identified victims include 1,631 customers and 460 employees.

The bank clarified that the newly confirmed data leak was not due to a new hacking incident. Instead, it resulted from cross-verifying the initial findings and analysis, which revealed additional individuals affected by the original breach.

A bank representative expressed sincere apologies to customers for not fully understanding the extent of the breach initially, stating, "We will do our utmost to implement thorough measures to prevent recurrence and protect our customers."

The bank also plans to individually notify the newly identified customers about the breach and provide them with information on how to prevent secondary damage.




* This article has been translated by AI.

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