Hackers breach Brazil's emergency alert system, triggering mass unauthorized message

An unauthorized cell broadcast reached phones across multiple Brazilian states on June 20, 2026, following a suspected hacking attack on the country's emergency alert infrastructure. Brazilian authorities confirmed the message was not issued by any official agency. The breach exposes a critical vulnerability: cell broadcast delivers to every compatible device simultaneously across a geographic area, making the dispatch layer a high-leverage attack surface. A successful spoofed alert risks eroding public trust in genuine emergency notifications.