What are Rockwell Allen-Bradley PLCs used for?

They're industrial controllers running automation in factories, utilities—think sequencing motors, monitoring flows in energy and water systems.

How many US critical infrastructure devices are exposed to Iranian hackers?

Censys counts nearly 3,900 Rockwell PLCs in the U.S., part of 5,200+ globally, mostly field gear on cellular nets.

What should OT operators do about Iranian PLC attacks?

Hunt IOCs from CISA alerts, patch EOL firmware, kill cellular internet paths—go air-gapped or VPN-only, stat.

🌐 Nation-State Threats

Iran's Hidden Assault: 3,900 US PLCs Exposed in the Wild

Iranian attackers have 3,900 US industrial controllers in their sights. These aren't random servers; they're the brains of pumps, substations, and wastewater plants, wired straight to Verizon and AT&T.

theAIcatchup Apr 09, 2026 4 min read

Heatmap of 3900 exposed US Rockwell PLCs targeted by Iranian hackers

⚡ Key Takeaways

Nearly 3,900 U.S. Rockwell PLCs exposed to Iranian hackers, mainly in energy and water sectors via cellular connections. 𝕏
Devices use end-of-life software and extra open ports, amplifying risks beyond initial exploits. 𝕏
Attacks since March signal escalating OT targeting, demanding immediate segmentation and patching. 𝕏

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#Iran cyber attacks #OT security #PLC vulnerabilities #critical infrastructure

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Originally reported by CyberScoop

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