If your shop is trying to become CMMC Level 2 compliant (the government’s rulebook for cybersecurity), the answer is pretty simple: yes.
Most CNC machines just aren’t built to live safely on a network. Here’s why.
Why CNC Machines Don’t Belong on the Network
Think of your CNC like a classic car: reliable, powerful, but built in a time before seatbelts, airbags, and modern safety systems. You wouldn’t put that car on a high-speed freeway without protection — and the same goes for your CNC on a network.
To meet today’s security rules, machines on the network need to:
-
Get regular software updates
-
Run antivirus protection
-
Be checked and fixed for vulnerabilities
The problem? CNCs don’t do any of those things. They weren’t designed with cybersecurity in mind.
What Happens if You Ignore This?
If a CNC is hooked into your shop network, it can be a wide-open door for hackers. Even worse, in a CMMC audit it will almost certainly be flagged as out of compliance — which can put contracts at risk.
The Safer Alternative
The safest way to use a CNC in a CMMC-compliant shop is to keep it off the network entirely (what’s called “air-gapped”). Instead, you:
-
Transfer programs with a clean, write-protected USB drive
-
Keep a log of every transfer
-
Follow your shop’s policies for protecting that media
It may feel a little “old school,” but it keeps the machine secure and your shop compliant.
Bottom Line
CNC machines are great at cutting parts, not at defending against hackers. Since they can’t be patched or protected like regular computers, the smart move is to keep them off the network and use controlled USB transfers.
That way, you stay compliant, protect your contracts, and keep your shop running smoothly.
