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Daishin Securities confirms leak of 38,490 customer records

Daishin Securities confirmed that personal and credit information of 38,490 customers was leaked, after hackers made abnormal access attempts to a server linked to non-face-to-face investment account openings on the 17th, according to Yonhap and Chosun Ilbo. The brokerage blocked the attacking IPs, reported to regulators, and is investigating the breach's scope with the Financial Security Institute. The Korea Times reports the leak included names, email addresses, and mobile phone numbers, and that Daishin, along with Mirae Asset Global Investments and Bithumb, are among the latest victims of cyberattacks on Korea's financial sector. Korean media coverage focuses on the breach's details and the broader wave of attacks, with no public reaction from customers or bloggers detailed in the supplied documents.

  1. Personal data of some 38,000 customers at Daishin Securities leaked Korea Times · 2026-10-28
  2. Personal data of some 38,000 customers at Daishin Securities leaked Yonhap · 2026-10-28
  3. (LEAD) South Korean financial firms confirm data breach of customer data Yonhap · 2026-10-28
  4. Bithumb, Mirae Asset, Daishin join growing list of cyberattack victims Korea Times · 2026-10-28
  5. 대신증권, 고객 3만8490명 개인·신용정보 유출 조선일보 · 2026-10-28

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