A Keurig K-Supreme SMART coffee maker reportedly generated 1,008.45GB of upstream traffic over 10 days, according to a network screenshot shared by an IT professional. The device was connected to a 2.4GHz Wi-Fi network and showed an average upstream rate of approximately 9 Mbps.
The user, a specialist at Prusa, initially suspected a major data leak but later concluded the UniFi system likely misreported local junk data. The issue was temporarily resolved by rebooting the coffee maker and moving it to a segregated VLAN. No packet capture was performed to confirm the exact nature of the traffic.
The K-Supreme SMART model features BrewID technology for pod recognition and supports remote control via Alexa and Google Home. The device uses Microsoft Azure RTOS for its networking stack. Keurig has not yet provided an official statement regarding the incident.
The incident highlights ongoing concerns regarding IoT device network behavior. While the coffee maker functions without Wi-Fi, many features rely on cloud connectivity. The user suggested that Keurig should address potential flaws in the device's network stack to prevent similar occurrences.
