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First-half cyber intrusion reports up 20 percent in South Korea as DDoS and ransomware surge

Reports of cyber intrusion incidents in South Korea rose about 20 percent in the first half of 2026 from a year earlier, a government report showed. The Korea Internet & Security Agency received 1,236 cases, up 19.5 percent, as DDoS attacks and ransomware increased sharply. The ministry and KISA also flagged threats linked to the spread of generative AI, open-source supply-chain attacks, and data leaks exploiting APIs and stolen accounts.