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South Korea Agency Fines SK Telecom $97 Million over Major Data Leak

South Korea's top privacy regulator fined SK Telecom 134.8 billion won for weak cybersecurity and delayed breach notification after a data leak affected nearly 27 million users.

  • On Thursday, SK Telecom, South Korea’s largest mobile carrier, was hit with a record fine of around $97 million following a cyberattack that exposed the personal data of close to 27 million users.
  • The breach stemmed from a June 15, 2022, cyberattack enabled by weak cybersecurity and delayed notification to customers.
  • South Korea’s data privacy regulator identified significant flaws in SKT’s cybersecurity, including inadequate encryption of USIM authentication keys and poor access management, which led to the exposure of 9.32 GB of USIM-related personal information.
  • PIPC Chairperson Ko Hak-soo said the fine reflected serious failings and risk scale but was reduced since SKT gained no direct economic benefit.
  • SK Telecom promised to invest 700 billion won in cybersecurity improvements and offer free SIM replacements while reviewing the sanction carefully.
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(Seoul = Yonhap News) Reporter Yang Jeong-woo = The Personal Information Protection Commission has filed a complaint against SK Telecom (hereinafter referred to as SKT), which suffered the worst hacking incident in which personal information of 23 million users was leaked...

·Korea, Republic of
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Bloomberg broke the news in United States on Thursday, August 28, 2025.
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