The US Department of Homeland Security's July 2026 DeepSeek order cited security research finding multiple critical vulnerabilities in DeepSeek's iOS app

In October 2026, the US Department of Homeland Security made public a July 2026 order that removes Chinese AI company DeepSeek's products, and third-party services built on its models, from civilian federal agency IT systems and bars agencies from buying them, citing national security and data risks.