A Keurig K-Supreme SMART coffee maker pushed 1,008.45 GB upstream and pulled 9.94 GB downstream over its home Wi-Fi network in 10 days and 9 hours, according to a UniFi console screenshot posted by X user @NomadsGalaxy on October 5.

The post, which tagged @Keurig, showed the device saturating an access point on its own and triggered the user's parents to ask why their home network had slowed. Nomad wrote that he was tempted "to scan it's [sic] packets with Wireshark and other tools," but kept the brewer offline rather than run captures.

The logged upstream rate of roughly 9 Mbps works out to about 97 GB per day — roughly 27 times the 3.6 GB per day that an LG smart washer was reported to consume in 2024.

What kind of device is it?

The brewer is the Keurig K-Supreme SMART with BrewID, a connected mid-range model. BrewID reads Keurig-made pods over Wi-Fi and applies each roaster's recommended settings. The machine connects only on 2.4 GHz, a band chosen for range and wall penetration rather than throughput, which caps bandwidth but does not explain a terabyte.

What does the MAC address reveal?

The UniFi screenshot lists the brewer's Wi-Fi MAC address inside a block registered to Jabil on Feb. 18, 2021. Jabil's product pages advertise Wi-Fi and Bluetooth RF design, embedded IoT modules, and connected-appliance programs. Keurig has previously named Nypro, a Jabil subsidiary, as a manufacturing partner. The MAC assignment confirms who built the radio module, but not who wrote the firmware.

What is running on the chip?

Keurig's open-source notice lists Microsoft's Azure RTOS, an off-the-shelf real-time operating system and networking stack that embedded OEMs license for IoT products. The documented cloud payloads are small: power state, brew state, pod-recognition result, and software version, per the community pykeurig Home Assistant project. One terabyte of upstream traffic is orders of magnitude beyond what those fields would produce, and the proprietary firmware is not public.

How was the issue resolved?

Nomad rebooted the brewer and placed it on a segregated VLAN. The unit already lived on a dedicated IoT SSID with his parents' other smart devices, but almost nothing was being filtered. He later acknowledged that the UniFi controller had not logged an actual 1 TB upload, suggesting most of the traffic was local broadcast or multicast noise rather than data leaving the home. He decided against packet captures and left the machine unplugged. "I would be unplugging my dad's machine and getting my parents a new one," he wrote.

Why does this matter beyond one brewer?

The K-Supreme SMART is still on Keurig's current product page. Its 2.4 GHz-only radio and lightweight Azure RTOS networking stack leave little headroom for runaway broadcast loops — a known failure mode on consumer embedded TCP/IP implementations. Keurig's smart line syncs brew history and K-Cup recognition to the cloud to power Keurig Perks loyalty points, and the brewer cannot deliver those features without Wi-Fi.

LG, the other recent IoT-data focal point, told Tom's Hardware last month that its smart TVs perform local network scans as a "standard function commonly provided by smart TVs and smart home devices" when standby voice features are active. That case involved captured packets and intended behavior. The Keurig case is the opposite: an apparent firmware or stack bug whose scope is unconfirmed.

What happens next?

Keurig has not commented on record. Nomad warned that other units could behave the same way, which raises the odds of a firmware patch or an official statement if more owners report matching traffic volumes. Either path will test how the company handles IoT-firmware defects in connected appliances that remain on shelves and on home networks.