RCtea

China Public Security Ministry Warns IoT Operators: Default Passwords on Devices Like Bus Stop Displays Violate Cybersecurity Law Even Without Major Incidents

A bus electronic display router in Wuhu, Anhui, was compromised in April 2026 because the device retained factory-default credentials and exposed multiple management ports. The Ministry of Public Security highlighted the case in its Hu Wang 2026 report, stressing that failing to change default passwords and leaving ports open constitutes a violation of the Cybersecurity Law regardless of whether serious harm occurred. The RCtea botnet actively targeted similar routers and cameras across China, infecting 9,827 devices in just six days in January 2026 through Telnet brute-force attacks. Experts from the Chinese Academy of Social Sciences clarified that penalties do not require actual damage and that operators must implement technical measures, retain logs for at least six months, and maintain internal security procedures. Additional cases in Qinghai and Nanchong demonstrated repeated enforcement actions against entities that ignored weak-password remediation orders. The report calls on operators, regulators, and manufacturers to enforce password changes at installation, close unnecessary ports, and apply network segmentation to prevent low-hanging IoT devices from becoming botnet recruits.