Privacy Unpacked

Confirmed breach

Daishin Securities data breach

KRSouth Korea · 대신증권

한겨레, en.fnnews.com and YTN reported a data breach at Daishin Securities (South Korea) on 27 October 2026, and it has been confirmed. It affected 38,490 customers. Exposed: Financial account and card details, Email addresses, Phone numbers, Names, Addresses and Communication IDs and more.

Status
Confirmed breach
People affected
38,490 customers
Reported
27 October 2026
Who is affected
South Korea

What was exposed

  • Financial account and card details
  • Email addresses
  • Phone numbers
  • Names
  • Addresses
  • Communication IDs
  • Communications IDs

How it happened

How
Hacking 투자일임 비대면 증권계좌개설 연계서버에 대한 해커의 비정상적인 접근이 포착 source
Way in
investment mandate remote securities account opening linked server 투자일임 비대면 증권계좌개설 연계서버 source

Sources

If Daishin Securities had your data

  1. Look for Daishin Securities’s own notice or letter: it should say what of yours was involved. Keep it.
  2. Call your bank on the number printed on your card (never one from a message), check recent payments and ask for a new card.
  3. Expect scams that use your details: calls, texts or emails pretending to be Daishin Securities, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.

One email to confirm first. We use your address only for this alert, and one click deletes it.

More breaches in South Korea

  1. BithumbKRSouth Korea · 27 October 2026 Email addressesPhone numbersNames+2 650employees
  2. KB Kookmin BankKRSouth Korea · 26 October 2026 Credit information 2.2Kpeople
  3. Nol UniverseKRSouth Korea · 25 October 2026 Email addressesPhone numbersMember IDs+11 –not reported
  4. SpoonKRSouth Korea · 25 October 2026 Financial account and card detailsEmail addressesPhone numbers+1 –not reported
  5. Mirae Asset Life InsuranceKRSouth Korea · 25 October 2026 Personal credit informationPersonal and credit information –not reported

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From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Found a mistake? Tell us and we correct it.