ENKR

Daishin Securities customer data breach

Add to my breach check

Made public · 38,490 people

What leaked6

Hard to replace

  • Bank account number
  • Mobile number
  • Home or delivery address
  • Email address
  • Username

Permanent

  • Full name
  • Bank account numberbank name; deposit and withdrawal account number · encrypted; Daishin securities account number · encrypted
  • Mobile numberencrypted
  • Full namecustomers; items differ from person to person
  • Usernametrading login ID

To-dos4 · about 45 min in all

  1. Know the scam pattern: calls and texts that cite these leaked detailsabout 5 minfreeLimits harm from: scam calls, phishing messages
  2. Register as an exposed person with the FSSabout 10 minLimits harm from: scam calls (opens in a new tab)
  3. Block new loans and cards in your nameabout 10 minLimits harm from: scam calls (opens in a new tab)
  4. Remove your address and phone from public profiles and tighten SNS privacyabout 20 minfreeLimits harm from: visits or contact at home

What happened next10 events

  1. UndetectedNone on record
  2. Response 9 eventsNo individual notice on record · show events
  3. RemedyNone on record
  4. Penalty 1 eventOngoing · show events
  5. DisputesNone on record
  1. FSC: a customer data leak was also confirmed during the investigation of the Daishin incident; FSS and the Financial Security Institute to investigate closely
  2. Daishin Securities: no secondary harm from the leak found so far
  3. The customer support centre takes damage reports
  4. Online check of whether one's data leaked, linked from the notice
  5. Apology in the notice, in the CEO's name
5 more
  1. Notice on the company website: data of 38,490 people leaked
  2. Illegal access attempt from outside detected; the investigation found the leak on 26 October
  3. Reported to the regulators; helping their investigation
  4. Further vulnerability checks and security measures; monitoring through the security control system strengthened
  5. The attacker's IP and a bypass IP blocked on discovery
Company
Daishin Securities
Company detected it
Made public
Notice
Leak confirmed
Affected
38,490 people · company notice

How the facts developed

  1. Company notice: an illegal access attempt from outside was detected on October 17, 2026, and the investigation found on October 26, 2026 that personal (credit) data had leaked; 38,490 people so far

Sources