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Hackers have reportedly broken into 25 servers across four countries, including systems connected to a U.S. government-affiliated organization. Security researchers also discovered evidence that AI tools may have played a role in the attack.

According to a new report from Dream Research , published Monday, the attackers exploited critical vulnerabilities in PHP , a programming language used by millions of websites, before using another security flaw to gain full control of vulnerable systems.

The attacks targeted servers in the United States, Japan, Taiwan and South Korea. Researchers found evidence pointing to a possible Chinese connection, although they have not identified the attackers or confirmed any government involvement.

What makes the discovery particularly concerning is how far the attackers managed to get. In one U.S.…