SK Telecom
SK Telecom says malware breach lasted 3 years, impacted 27 million numbers
SK Telecom says that a recently disclosed cybersecurity incident in April, first occurred all the way back in 2022, ultimately exposing the USIM data of 27 million subscribers. SK Telecom is the largest mobile network operator in South Korea, holding roughly half of the national market. On April 19, 2025, the company detected malware on its networks and […]
SK Telecom cyberattack: Free SIM replacements for 25 million customers
South Korean mobile provider SK Telecom has announced free SIM card replacements to its 25 million mobile customers following a recent USIM data breach, but only 6 million cards are available through May. SK Telecom is the country’s largest mobile network operator, serving roughly half of the domestic mobile phone market. On April 19, the […]
SK Telecom warns customer USIM data exposed in malware attack
South Korea’s largest mobile operator, SK Telecom, is warning that a malware infection allowed threat actors to access sensitive USIM-related information for customers. SK Telecom is the largest mobile network operator in South Korea, holding approximately 48.4% of the mobile phone service market in the country, corresponding to 34 million subscribers. The company says they detected malware […]