Millions of SK Telecom customers are potentially at risk following USIM data compromise
Security Affairs
APRIL 22, 2025
SK Telecom warned that threat actors accessed customer Universal Subscriber Identity Module (USIM) info through a malware attack. SK Telecom is South Koreas largest wireless telecom company, a major player in the countrys mobile and tech landscape. It holds about 48% of the market share for mobile services, meaning around 34 million subscribers use its network.
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