Scammers have been abusing unsecured cellular routers used in industrial settings to blast SMS-based phishing messages in campaigns that have been ongoing since 2023, researchers said. The routers, manufactured by China-based Milesight IoT Co., Ltd., are rugged Internet of Things devices that use cellular networks to connect traffic lights, electric power meters, and other sorts of remote industrial devices to central hubs. They come equipped with SIM cards that work with 3G/4G/5G cellular netwo...