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Advisories Active incidents Threat map Academy Services Solutions

Day One Company · Organization | 資安通報

Organization

Day One Company

Related advisories 1

◆HighData breachMonitoringBackfillMedia reportedJun 11, 2026· updated Nov 11

South Korea's Day One Company: stolen GitHub key leads to member data leak across Fastcampus and 7 other brands

According to Yonhap News TV, Day One Company, operator of Fastcampus and other online education brands, said a GitHub master account key was stolen and used for a first intrusion into its services on May 9, 2026 .

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