Private networks don’t eliminate risk. They often hide it better until attackers find the one device everyone assumed was safely out of reach.

The reported breach involving a Polish CHP plant, a Fortinet device, and access through a private APN is a sharp reminder for anyone operating critical infrastructure:

Attackers do not care how your architecture is labeled. They care where trust is assumed.

A private APN, VPN, firewall, or remote maintenance link can become a blind spot when it sits between IT, telecom, and operational technology. These seams are where ownership gets blurry, monitoring gets weaker, and “secure by design” turns into “secure by assumption.”

For founders, operators, and infrastructure leaders, the lesson is not simply “patch the firewall.” It is broader:

Treat every remote-access path as part of the attack surface.
Validate who owns each connection.
Monitor private links like public ones.
Segment operational environments aggressively.
Test incident response across IT, telecom, and OT teams.
Assume trusted pathways can be abused.

Operational resilience is not only about keeping systems running. It is about knowing which hidden dependencies could stop them.

The uncomfortable question every operator should ask now:

If an attacker entered through a “private” route, would we see it in time?