U.S. District Judge Edward Davila of San Jose has issued a wide-ranging temporary restraining order aimed at blocking counterfeit Cisco Systems Inc. transceivers that the company warned could put the U.S. military and hospitals at risk of data breaches.

Davila ordered the seizure of counterfeit transceivers—devices that transmit and receive data in public and private networks—sold by Shenzhen Usource Technology Co., Shenzhen Warex Technologies Co. and Warex Technology Ltd. Davila also ordered the companies’ bank accounts frozen and that internet service providers, including Google and Baidu, delist any advertisements of Cisco-marked products.