State Department cable says an impostor used AI voice and text messages to pose as Secretary of State Marco Rubio to foreign ministers and US officials
A State Department cable dated 3 July 2025, sent to all US embassies and consulates and reported by The Washington Post, AP and The Guardian, said an impostor posing as Secretary of State Marco Rubio had contacted at least five senior officials, including three foreign ministers and a US governor, by text, Signal and voicemail, with the aim of gaining access to information or accounts. According to AP, two senior officials and the cable described the attempts as using technology driven by artificial intelligence; the Guardian reports that the messages mimicked Rubio's voice and writing style. The department said it was investigating and advised all employees and foreign governments. One official told AP the attempts had been unsuccessful; the technical basis for the AI description was not disclosed.
AI involvement reported · Causal attribution supported · 2 sources, 1 underlying account · Added 14/10/2026