South Korea's Ministry of Science and ICT (MSIT) issued a statement regarding the cybersecurity incident at SK Telecom [1]. The official investigation cited findings including the leakage of subscriber identity (USIM)-related data and infected servers [1]. Users should replace or protect mobile subscription-related credentials in accordance with guidance from the carrier and regulatory authorities [1].
Backfill: this event became public on Apr 28, 2025 and we added it on Nov 10, 2026. It is not a new event.
CriticalMonitoringBackfillOfficially confirmed
South Korea's MSIT Releases Investigation Findings on SK Telecom USIM Data Security Incident
1 min read
- Disclosed
- Apr 28, 2025
- Published
- Nov 10, 2026
- Last updated
- Nov 7, 2026
- CVSS basis
- Our assessment
- Attack vector
- Actor type
- Motivation
On this page
30-second summary
What happened
Who is affected
Industries mainly affected: Telecom
What to do nowOur advice
Users should replace or protect mobile subscription-related credentials in accordance with guidance from the carrier and regulatory authorities [1].
Timeline
- South Korean authorities release statement on SKT incident[1]
Technical details
Source-Supported Details
Please refer to the official pages of MSIT and SK Telecom for verified figures and protective measures [1].
Source excerpt: "About MSIT About MSIT Minister Vice Minister for Science, Technology and Innovation 1st Vice-Minister 2nd Vice-Minister About MI Organization Location Map Extension Agency" [1].
References
Official / primary1
- [1]
“About MSIT About MSIT Minister Vice Minister for Science, Technology and Innovation 1st Vice-Minister 2nd Vice-Minister About MI Organization Location Map Extension Agency”
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