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A critical PHP vulnerability, found with AI assistance, has triggered website shutdowns worldwide, with European government sites suspending operations as a precaution. The Korean government has issued a nationwide '주의' (caution) cyber crisis alert, and the National Security Office held an emergency meeting involving public, private, and military sectors to coordinate a response. However, a Chosun Ilbo report citing French security firm CybelAngel notes that about 82% of domestic PHP servers run outdated versions that cannot apply the security patch, leaving them exposed. Yonhap reports the flaw allows attackers to execute malicious code on web servers without login, risking data leaks and service disruptions. Korean media urge immediate updates, with Hankyung warning that web application firewalls alone cannot fully block attacks.