An IT professional said his parents' Keurig K-Supreme SMART coffee maker generated roughly 1TB of Wi-Fi traffic in 10 days, enough to saturate an access point. In an X post, user @NomadsGalaxy shared a UniFi screenshot showing 9.94GB down and 1,008.45GB up over 10 days and 9 hours. The owner unplugged the machine and later suspected a bug, noting that most of the traffic did not leave the home network.
The brewer's advertised features include remote brewing, scheduling, voice control, and BrewID pod recognition. The type of data such features normally send is small, so the volume reads as a malfunction. The owner did not run packet captures, and Keurig has not commented. The device's MAC address block is registered to Jabil, a contract manufacturer, but that does not confirm the hardware's origin.
After rebooting the brewer and placing it on a segregated VLAN, the behavior stopped, at least temporarily. The owner recommended Keurig fix the network stack. The incident is a reminder that smart-home devices can fail in ways that disrupt a home network even when their normal data payloads are tiny.