NSA and Five Eyes Allies Issue Joint Advisory Warning of Expanding Cyber Attack Surface in LEO Satellite Constellations

The NSA joined Australia Signals Directorate, Canadian Centre for Cyber Security, New Zealand NCSC, and Australian Space Agency in releasing a cybersecurity information sheet titled Securing Space: Cyber Security for Low Earth Orbit Satellite Communications. The advisory warns that growing LEO constellations are expanding the attack surface for malicious cyber actors, with systems vulnerable to jamming, spoofing, and interception due to distributed architecture and reliance on radio frequency links. The agencies identified risk vectors spanning satellites, ground stations, user terminals, communication links, and supply chains. The guidance is significant as LEO SATCOM systems increasingly underpin national security communications and emergency response capabilities.