The FBI has labelled a suspected Chinese cyber intrusion into a government surveillance system as a major incident that could pose risks to U.S. national security. The hack compromised sensitive information related to domestic law enforcement. The revelation suggests a significant U.,S. counterintelligence failure amid ongoing hacking operations by China-linked actors. The cyber intrusion used similar tactics and techniques used by a Chinese hacking effort known as Salt Typhoon, which penetrated major telecommunications providers in an unprecedented breach in 2024. The breach shows that Chinese-backed hackers continue to target the US despite global attention generated by Salt Typhoon. Democratic Sen. Mark Warner of Virginia, the vice chair of the Senate Intelligence Committee, warned of the increasing threat posed by China and other sophisticated cyber adversaries.