The Satellite Cybersecurity Act of 2025 directs the federal government to strengthen oversight and support for the cybersecurity of privately owned commercial satellite systems, such as those operated by companies holding U.S. business licenses. It requires the Government Accountability Office to study and report within two years on how federal agencies currently protect commercial satellites from cyber threats, including their reliance on foreign-owned systems and infrastructure. The Department of Commerce, working with the Department of Homeland Security, must create a public online clearinghouse within 180 days to share cybersecurity resources, tools, and voluntary best practices, with special materials for small businesses. The bill also requires Commerce to consolidate cybersecurity recommendations covering topics like supply chain risks, foreign ownership vulnerabilities, and protection against jamming or hacking, and to submit a broader coordination strategy within 120 days involving agencies like NASA, the FCC, and the National Space Council. Importantly, the law explicitly avoids creating new regulations, designating satellites as critical infrastructure, or expanding any agency's existing authority, focusing instead on voluntary guidance, information-sharing, and periodic reporting to Congress over the next several years.