The US federal court filing system has been targeted in a significant hack, believed to be orchestrated by Russian hackers. Reports indicate that sensitive information, including sealed national security cases, has been compromised. The breach has raised concerns about the implications for confidential informants and ongoing court cases. In response, the Administrative Office of the U.S. Courts is implementing safeguards to strengthen cyber protections and enhance the security of the electronic case management system. This incident follows a history of known security flaws in the system and highlights the ongoing threat from foreign cyber adversaries.