Kyowon Group security incident history
Hacking, data breaches and other security incidents involving Kyowon Group, with related coverage.
Incidents: 1 · Most recent
Kyowon ransomware attack affects about 600 servers
5.5mImpact: About 600 virtual servers affected; 5.54 million customers at risk of information leak
Kyowon was hit by a ransomware attack on 10 January 2026, affecting about 600 virtual servers and disrupting operations at its affiliates. Kyowon reported the attack to investigative authorities and began recovery procedures, and on 12 January it confirmed signs that data had been leaked externally. Excluding duplicate subscriptions, 5.54 million customers are at risk of having their information leaked, and whether the actually leaked data includes customer information is under investigation.
Related reports: 3 · last report →