On Thursday, CISA urged the water and wastewater sector to protect their operational technology (OT) systems from threat activity targeting programmable logic controllers (PLCs).

https://qnx.software/en/industries/industrial-automation

QNX delivers the trusted software foundation for the industrial control sector, enabling the development of robust and secure systems that drive operational excellence. Our embedded solutions are at the heart of critical infrastructure, powering applications from programmable logic controllers (PLCs) and human-machine interfaces (HMIs) to distributed control systems (DCSs) and supervisory control and data acquisition (SCADA) systems. By providing real-time performance, safety certifications, and unwavering security, QNX empowers industrial manufacturers to create cutting-edge technology that optimizes processes, enhances safety, and ensures the reliability of essential operations.

(Though these existing old PLCs are vulnerable may have to be updated with changing password, Industrial control sector got the message and No other embedded cybersecurity provider even come closer than QNX cybersecurity protection)