Segmentation | Legacy ICS Exploitation

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Executive Snapshot CISA added a four-year-old SCADA vulnerability to its Known Exploited Vulnerabilities catalog after pro-Russian hacktivists weaponized it against industrial control systems. Your assumption that legacy OT patches are too old to matter just failed.

Signal Default credentials and unpatched web interfaces on internet-exposed HMI systems give low-skill attackers direct access to industrial environments without requiring advanced exploit chains.

Strategic Implication Hacktivists no longer need zero-days to disrupt operations. A 2021 patch you never applied and a factory-default password are sufficient to compromise your industrial perimeter.

Action Audit all internet-facing SCADA and HMI systems for OpenPLC ScadaBR deployments today. Rotate every default credential on industrial control interfaces now. Enforce network segmentation isolating OT environments from direct internet exposure this week.