CISA's new OT advisory changes the risk math for three utility operators.
The advisory is technical. The implication is executive: cyber insurance premiums will move within the quarter.
CISA's Wednesday advisory names three specific Rockwell and Siemens configurations in production at named US utility operators. This is a departure from the agency's usual pattern of anonymized advisories. The specificity is intentional and reflects an escalation in what the interagency considers acceptable public disclosure. Utility CISOs should assume premium reprices within 30 days and rate-case implications by Q2.
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