The Hidden Risks of Legacy Systems: Why Your Old PLCs are a Security Goldmine

Illustration of a legacy PLC with processor, power supply, and I/O modules inside an industrial control cabinet.

In many manufacturing facilities across the country, there is a silent veteran working tirelessly in the corner of a control cabinet. It might be an Allen-Bradley SLC 500 or a PLC-5: hardware that has reliably governed production lines for twenty, sometimes thirty years. To many plant managers, these systems are a testament to “if it … Read more