A smart coffee maker sent 1TB over its owners' Wi-Fi in 10 days, and nobody knows why
A coffee maker has one job, and uploading isn't it.
A coffee maker has one job, and uploading isn’t it. A Keurig K-Supreme SMART at an IT pro’s parents’ house logged 1,008.45GB up and 9.94GB down over 10 days and 9 hours, according to the UniFi screenshot he posted on X on October 6 (Tom’s Hardware). He goes by Nomad, works at Prusa, and went looking because his parents asked why their network was so slow.
Tom’s Hardware ran the numbers: an average of about 9 Mbps upstream, roughly 97GB a day, which could swamp an access point (Tom’s Hardware). The LG washer that drew attention in 2024 was reported at 3.6GB a day. This brewer did about 27 times that, and its whole job is hot water and a pod.
Nobody knows what it was sending. Nomad later said most of the traffic “didn’t escape my network,” and since UniFi hadn’t reported an actual 1TB upload, he concluded it was mostly local junk data (Tom’s Hardware). GadgetReview reports he described the likely cause as a bug in that unit’s software or network stack, not Keurig deliberately collecting a terabyte of data. He never ran a packet capture, and Keurig has no comment on record (Tom’s Hardware).
The fix was boring. Rebooting it and moving it to its own VLAN solved the problem, at least for now (Tom’s Hardware). It had already been on a separate network with his parents’ other smart devices, but not much was blocked there. GadgetReview points out the 1,008GB figure comes from one household’s monitoring and shouldn’t be read as a problem with every K-Supreme SMART.
If you’ve got smart appliances, I’d open your router’s app tonight and see how much data each one moves. GadgetReview suggests a guest network or a dedicated VLAN for connected appliances, so one that misbehaves can’t drag down everything else. Anything in the kitchen uploading more than your laptop has some explaining to do.