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yesterday

South Korea Launches Probe into SK Telecom's USIM Data Breach

Acting President Han Duck-soo orders scrutiny of SK Telecom's response and national data security measures following a massive cyberattack.

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Acting President Han Duck-soo (Yonhap)
SK Telecom Chief Executive Officer Ryu Young-sang (C) and other senior executives bow in apology during a press conference at the company's headquarters in Seoul on April 25, 2025, for causing trouble over a network hacking incident involving the potential leak of subscriber information. (Yonhap)

Overview

  • SK Telecom detected a cyberattack on April 18, potentially leaking the USIM data of 23 million subscribers.
  • The company is offering free USIM replacements starting April 28, at an estimated cost of 177.1 billion won.
  • Acting President Han Duck-soo directed government agencies to evaluate SK Telecom's response and analyze the breach's causes.
  • A joint civilian–government investigation, expected to last one to two months, has been initiated to examine the incident.
  • Authorities are also reviewing South Korea's data protection framework to enhance defenses against future cyberattacks.