Could a Smart Coffee Machine Overload Your Network?

A connected device does not need to hold customer records to affect a business. If it can join the network, it can consume bandwidth, create unwanted connections or become an entry point if it is compromised. The useful response is not to panic about every smart appliance. It is to know what is connected, what it needs to reach and how you would spot a problem.

What was reported about the coffee machine?

In October 2026, technology press reported that a network administrator using the name Nomad saw a Keurig K-Supreme SMART coffee maker account for about 1,008GB of traffic over 10 days and 9 hours. The reporting said most of the volume appeared to remain on the local network, and that the activity stopped after the device was restarted and moved to a separate network. A software fault was suggested as a possibility, not confirmed as the cause.

This is a user-reported observation, not an independent forensic investigation. There is no evidence in the reporting that the coffee maker was hacked, that its traffic was stolen data, or that the manufacturer confirmed a fault. The distinction matters: an unusual network graph is a reason to investigate, not proof of a breach. See Tom's Hardware's report for the reported figures and caveats.

Why IoT devices deserve a place in the security plan

Printers, cameras, meeting-room equipment, TVs, door systems, sensors and smart appliances often receive less attention than laptops and servers. Some still need updates and secure configuration; some have limited logging; and some make outbound connections that are not obvious to the person who installed them. A vulnerable device may expose itself, disrupt a network or be abused as part of a botnet.

The FBI's warning about BADBOX 2.0 describes compromised internet-connected devices being used in residential proxy services and criminal activity. Its examples include streaming devices, projectors and digital picture frames. This is evidence that IoT compromise is a real category of threat; it is not evidence that the reported coffee machine was part of BADBOX 2.0, or that every connected product is affected. Read the FBI/IC3 public service announcement.

Start with an inventory and a purpose

Record business-connected devices alongside computers and phones. For each device, note its owner, location, business purpose, supplier, model, support status and the person responsible for updates. A network scan or managed switch inventory can help, but compare the results with what staff actually use: unmanaged equipment and temporary installations are easy to miss.

Ask what the device must communicate with. A printer might need print traffic from selected workstations and access to its update service; it usually does not need unrestricted access to every server. A camera system may need a recording service and carefully limited remote administration. If the supplier cannot explain expected connections, treat that uncertainty as a question to resolve before broadening access.

Reduce the impact of a device problem

• Separate device groups. Put IoT and guest equipment on a separate network or VLAN where the design supports it. Segmentation is useful only when firewall rules restrict traffic between segments.
• Limit outbound access. Allow only required services and destinations where this is practical. Do not block traffic blindly; document the business need and test changes.
• Keep firmware current. Assign an owner to check updates, remove default credentials and disable unused services or remote access.
• Monitor proportionately. Review device inventory, unusual volumes, repeated connection failures and unexpected destinations. Set alerts that someone can investigate.
• Plan replacement. A device that no longer receives security updates may need isolation or replacement, especially if it sits near sensitive systems.

These controls are layered. A VLAN does not patch a vulnerable product, and a firewall cannot establish that data is being handled appropriately. Zero Trust ideas—verify identity, restrict each connection and review access—can guide the design, but are not a single appliance or a guarantee against attack.

What to do when traffic looks wrong

Confirm the device identity and the measurement period first. Check whether the figure represents upload, download, local switching or internet-bound traffic; these are not interchangeable. Preserve relevant logs, note recent firmware or network changes, and compare the activity with normal device behaviour. If disruption is continuing, contain the device safely by moving it to a restricted network or disconnecting it, while keeping essential business services available.

Then contact the supplier or IT team with timestamps, device details and the observed destinations. Do not factory-reset immediately if evidence may be needed to understand an incident. If personal data may have been exposed, follow the organisation's incident and data-breach assessment process.

A short IoT security check

Choose one office network and answer four questions: Can you name every connected device? Does each have a business owner? Are its required connections known? Could it reach systems it does not need? Gaps are a practical starting point for an improvement plan, not an automatic sign that an incident has occurred.

For help reviewing network boundaries, device access and evidence of current controls, see our cyber security services or talk to Altitude. Any review should be scoped to the systems and testing actually agreed.

Sources and further reading

• Tom's Hardware: report on the Keurig traffic observation
• FBI/IC3: BADBOX 2.0 and internet-connected devices