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South Korea's Major Banks Face Hacking Breach Investigation

South Korea's Major Banks Face Hacking Breach Investigation

First seen 20 Oct 2026, 16:14 UTC • •
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ThreatCluster AI
ThreatCluster •October 20, 2026 at 17:12 UTC
  • •16 financial institutions, including major banks, were affected by the hacking incidents.
  • •Approximately 100,000 personal records were exposed during the breaches.
  • •Bank CEOs have pledged to improve cybersecurity measures and utilize AI technologies.

South Korean police plan to refer hacking cases involving major banks to the Serious Crimes Investigation Agency after identifying potential violations of financial security laws. The breaches have affected 16 financial institutions, exposing approximately 100,000 personal records. The targeted systems primarily involved internal networks rather than core banking infrastructure, complicating jurisdictional issues. The Financial Services Commission has indicated that these cases may fall under the Electronic Financial Transactions Act, prompting further investigation. The National Office of Investigation has expanded its team to 43 investigators and is conducting a broader review of cybersecurity across the financial sector. In a related development, the CEOs of the top five banks publicly apologized for the breaches and committed to enhancing security measures, including the use of AI-driven systems.

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Timeline

2026-10-06
Formal investigation launched
The National Office of Investigation began a formal inquiry into the hacking cases affecting financial institutions.
Koreaherald
2026-10-19
Bank CEOs testify and apologize
CEOs of South Korea's top five banks apologized for the hacking breaches during a National Assembly audit.
En.Sedaily
2026-10-20
Police refer cases to Serious Crimes Agency
South Korean police announced plans to refer hacking cases to the Serious Crimes Investigation Agency for further investigation.
Koreaherald

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Common questions

What financial institutions are affected?
The breaches have affected 16 financial institutions, including Shinhan Bank, KB Kookmin Bank, and Hana Bank.
What measures are being taken to enhance security?
Bank CEOs have pledged to improve cybersecurity by securing budgets for personnel and implementing AI-driven security systems.
What is the current status of the investigation?
The police are continuing their investigation while determining if the Serious Crimes Investigation Agency will take over the cases.