New NCSC-Led OT Security Guidance for Nuclear Reactors

Four Principles Positioning the Nuclear Ecosystem for Long-Term Cyber Resilience Elizabeth McAndrew-Benavides • February 13, 2026

Last month, the U.K. National Cyber Security Centre in partnership with the Cybersecurity and Infrastructure Security Agency, the Federal Bureau of Investigation and other international partners released a new guidance, titled "Secure Connectivity Principles for Operational Technology."

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Highlighting eight foundational security principles, the guidance has been designed to help organizations "mitigate exposed and insecure connectivity and protect networks from highly capable and opportunistic cyberthreat actors, including nation state-sponsored actors," according to a CISA press release.

The advisory arrives amid rapidly intensifying IT-OT convergence - and as threat actors increasingly target OT environments as primary objectives, rather than treating OT compromise merely as a gateway into IT networks. In the past 12 months, 22% of critical infrastructure organizations suffered a security incident impacting ...