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Inside the SK Telecom Data Breach: What Happened and What Companies Can Learn

July 15, 2025 By Hanna Hewitt and Kim Peretti

In April 2025, SK Telecom—South Korea’s largest mobile carrier—formally notified regulators of a significant data breach that compromised sensitive SIM card data belonging to nearly 27 million users. Following an investigation, the Ministry of Science and ICT and the Korea Internet & Security Agency (KISA) concluded in July 2025 that SK Telecom was negligent in […]

Filed Under: Cybersecurity, Data Breach, Enforcement, South Korea Tagged With: Breach reporting, Cybersecurity, Enforcement, Enforcement Action, International, South Korea

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