Washington, D.C., — The U.S. Defense Intelligence Agency (DIA) has warned that Russia is developing a satellite designed to carry a nuclear weapon into orbit, potentially threatening thousands of military, commercial, and civilian satellites worldwide.
The assessment appears in the agency's latest unclassified report, Challenges to Security in Space 2026, released on October 26. The report is the third in the DIA's series of space threat assessments and covers information current as of July 2026.
According to the report, Russia is pursuing the capability despite its obligations under the 1967 Outer Space Treaty, which prohibits placing nuclear weapons and other weapons of mass destruction in orbit around Earth.
Nuclear Detonation Could Damage Thousands of Satellites
The DIA assessment warns that a nuclear explosion in space could cause widespread electromagnetic disruptions and create artificial radiation belts. These high-energy radiation zones could persist for years, progressively damaging or destroying satellites even after the initial explosion.
The effects would extend beyond military spacecraft to civilian and commercial satellite networks supporting GPS navigation, telecommunications, weather forecasting, financial transactions, scientific activities, and national security services.
The report notes that a nuclear anti-satellite (ASAT) weapon could cause the rapid loss or degradation of thousands of satellites operated by countries and companies worldwide.
However, the DIA has not confirmed that Russia has deployed a nuclear weapon into orbit. The system remains under development.
Russia's Space-Based Nuclear Weapon Development
The report also discusses Russia's Cosmos 2553 satellite, launched in February 2022. Moscow described the satellite as a platform for testing the effects of space radiation on electronic components.
U.S. officials have previously linked related Russian activities to research and development for a potential nuclear anti-satellite capability.
The DIA assessment also highlights the growing importance of commercial satellite communications during the Russia-Ukraine conflict. The effectiveness of commercial satellite networks supporting Ukrainian forces has contributed to Moscow's view that commercial space infrastructure can be a legitimate military target.
A nuclear ASAT capability could potentially threaten large constellations of commercial satellites that would be difficult to destroy individually using conventional missiles.
DIA Assessment on China's Space Weapons
The report also examines China's space capabilities, stating that there is no indication that China plans to actively test or develop a nuclear anti-satellite weapon for use in space.
China is also a party to the Outer Space Treaty.
The broader assessment examines the space and counterspace strategies of China, Russia, Iran, and North Korea. It highlights the expansion of dual-use space capabilities, growing cooperation among these countries, the increasing role of commercial satellites in national security, and hazards such as orbital debris.
The DIA warns that introducing a nuclear weapon into orbit would create a serious challenge for the safety and sustainability of international space operations, particularly as the number of active satellites continues to increase.
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