KB Kookmin Bank finds 2,091 more people affected by data leak

Key facts

• An additional 2,091 people were found to have had personal information compromised.
• The total number of affected individuals now stands at 2,210.
• The newly identified individuals include 1,631 customers and 460 employees.
• The bank stated the increase was due to a detailed examination of data and processes, not a new attack.
• Leaked information previously confirmed to include names, phone numbers, and addresses.

KB Kookmin Bank announced on Monday, October 26, 2026, that an additional 2,091 individuals had their personal information compromised in a hacking incident that occurred earlier in the month. This discovery raises the total number of affected people to 2,210, following the initial confirmation of 119 individuals on October 2. The newly identified group comprises 1,631 customers and 460 company executives and employees. The bank clarified that this increase resulted from a thorough review of data and processes connected to the compromised system, not from any new hacking attacks. The previously leaked information included names, phone numbers, and addresses.