US EditionSK Telecom reveals cyberattack, customer USIM data stolen could be used in attacks
- SK Telecom, a major South Korean provider, reported a security incident on April 19, 2025, exposing customer USIM data.
- A detected malware infection allowed threat actors to gain access to sensitive USIM-related information.
- The company immediately implemented countermeasures, including removing malware and isolating the affected systems.
- SK Telecom, which serves 34 million subscribers, promptly notified relevant regulatory authorities of the breach.
- Investigations are ongoing to determine the exact cause and scope, with no confirmed cases of data misuse reported yet.
23 Articles
23 Articles
(Seoul = Yonhap News) Reporter Jo Seong-mi = SK Telecom [017670], which has the largest number of subscribers in Korea, has had hackers infiltrate its internal system and steal customer USIM data...
SK Telecom reports hacking incident involving partial leak of user USIM data
SK Telecom, Korea's leading mobile carrier, said Tuesday it has reported a hacking incident involving the partial leakage of information related to customers' universal subscriber identity module (USI...
The Future of National Sovereignty Lies in Securing Digital Identity Infrastructure
In increasingly digitalized societies, the management of digital identity has emerged as a critical national concern—one whose implications extend far beyond traditional commercial frameworks.The 2025 SK Telecom data breach, compromising sensitive subscriber authentication credentials for over 23 million users, alongside the 2022 KakaoTalk service outage that disrupted communication, finance, and public services across South Korea, highlight a p…
On Tuesday of this week, SK Telecom, South Korea's largest cellular operator, announced it had suffered a cyber attack and had lost its customers' data to hackers. The attack occurred at 11pm on Saturday evening last week, during which time it was reported that some users' USIM card information had been lost. Under the country's law, it is obliged to notify the Korean Internet and Security Agency within 24 hours of an attack of this magnitude. S…
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