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A critical PHP vulnerability has triggered emergency responses worldwide, with European government sites going offline and U.S. authorities advising operators to take sites down if they cannot patch immediately, according to Korea Times and Maeil Business Newspaper. The flaw, discovered with AI assistance, allows system takeover without authentication, affecting over 70% of websites, Yonhap and Chosun Ilbo report. In Korea, the government has urged companies to patch, with KISA recommending immediate updates to the latest version, and is reviewing emergency patch support, as reported by Yonhap and Dong-A Ilbo. Korean IT and security firms are responding urgently, Yonhap adds.