Company says there is a lack of evidence of any data misuse.
South Korean telecommunications provider SK Telecom had some of its customers' USIM details leaked following the compromise of its systems.
According to The Korea Times, SK Telecom is investigating the possible exposure of other personal data and the cause of the intrusion. The company has confirmed it mitigated the incident, and said there was a lack of evidence of any data misuse.
Aside from committing to adopt extensive systems monitoring and enhanced blocking systems for illicit SIM activity, SK Telecom has also disclosed plans to bolster SIM suspension and notification protocols.
"We will further strengthen our security system to prevent similar incidents from recurring and do our utmost to establish customer information protection measures," said the company, which also noted the availability of free SIM protection services on its website.
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Dan Raywood is a B2B journalist with 25 years of experience, including covering cybersecurity for the past 17 years. He has extensively covered topics from Advanced Persistent Threats and nation-state hackers to major data breaches and regulatory changes.
He has spoken at events including 44CON, Infosecurity Europe, RANT Forum, BSides Scotland, Steelcon and the National Cyber Security Show, and served as editor of SC Media UK, Infosecurity Magazine and IT Security Guru. He was also an analyst with 451 Research and a product marketing lead at Tenable.
