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"Millions of PLC (programmable logic controllers) used in industrial environments worldwide are at risk to 15 vulnerabilities in the CODESYS V3 software development kit, allowing remote code execution (RCE) and denial of service (DoS) attacks"
@lupyuen
But an incredibly small subset of those are sitting on public networks, or even on IT networks within a firm.
Once you are inside the operations networks of production facilities, there is soooo much equipment that has no security at all. People bet that without a "cable" to the Internet, it is much safer anyway.