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Iran-linked cyberattack shut down a UK power plant

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Iran-linked cyberattack shut down a UK power plant

An Iran-linked cyberattack disabled a small UK power plant for four days in August 2026, occurring alongside intrusions affecting water utilities across 12 US states. Threat analysts attribute both campaigns to Iranian operatives responding to Middle East tensions, with recent activity incorporating artificial intelligence (AI)-generated exploitation scripts targeting Siemens programmable logic controllers (PLCs) at critical infrastructure sites.

Why it matters: Energy and water utility operators across the UK and US face active, evolving threats from Iranian-affiliated actors using AI-assisted techniques against internet-connected industrial control systems, requiring immediate verification of PLC exposure and implementation of network segmentation.

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