Programmable Logic Controllers and Cybersecurity Risk | UpGuard

This article explains the role of PLCs in ICS/OT and outlines security risks and mitigations aligned to IEC/ISA 62443 and NIST SP 800-82, recommending asset inventory, threat analysis, vulnerability management, least functionality, strong authentication, network segmentation, and tested backups. It highlights historical incidents (e.g., Stuxnet) to illustrate impact and enumerates PLC-related services/ports that should not be internet-exposed—such as GE-SRTP (6262/6263), Mitsubishi EQ (5000/5007), Modbus/S7 (102), Rockwell/ProConOS (44818), and Unitronics PCOM (20256/20257)—and promotes continuous monitoring (e.g., UpGuard) to identify exposed PLC attack surface.