Hack of Dallas Sirens Not the First or Last on Emergency Systems, Experts Warn

Unidentified attackers remotely activated 156 civil defense sirens across Dallas via what investigators suspect was an RF-based trigger or compromise of the siren management system, causing widespread disruption and calls to 911. The report links this event to prior siren/EAS compromises and to insecure emergency alerting software and hardware, noting that legacy designs, poor physical security, limited budgets, and a radio-centric emergency-response culture leave such systems vulnerable.