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CISA Cyber Storm exercise offers blueprint for enterprise CISOs
The launch of CISA's Cyber Storm X puts national incident response to the test. For enterprise CISOs, the exercise serves as a practical model for evaluating supply-chain resilience and incident response playbooks under fire.
This month, the Cybersecurity and Infrastructure Security Agency (CISA) launches the 10th edition of its national Cyber Storm exercise. The event arrives at a critical juncture for enterprise security leaders with CISA finalizing mandatory rules that enforce strict 72-hour incident disclosure windows. The exercise provides a practical blueprint for enterprise CISOs to stress-test their own incident response.
Cyber Storm X brings together public and private organizations to simulate a major cyber incident affecting U.S. critical infrastructure. CISA reports that roughly 2,000 critical infrastructure owners and operators will participate, including IT personnel, legal teams, crisis communications professionals, government employees and enterprise leaders.
Mitchell Freddura, Deputy Office Chief for Industry Partnerships at CISA's Joint Cyber Defense Collaborative, framed the exercise as an essential test for operational readiness. "Planning and preparation are key," he said. "Speed and efficacy during a crisis are derived from the preparation for a crisis. At CISA, we are working not only with our federal partners, but with our industry partners, to build cybersecurity doctrine and documents that can create a bridge for how we would collaborate on a significant cyber crisis."
At the Billington Cybersecurity Summit in Washington, D.C. this week, NSA Cybersecurity Director David Imbordino warned that adversaries increasingly exploit private enterprise infrastructure as entry points for broader national disruption. When nation-state actors target commercial supply chains, corporate SOCs effectively become the front lines of defense.
CISA’s Cyber Storm X directly addresses this dynamic, providing a real-world testing ground where enterprise CISOs can evaluate how their organizations withstand cascading, multi-sector attacks.
Pressure testing national cyber response
Cyber Storm began in 2006 as the federal government's first full-scale, agency-led cybersecurity exercise. Held every two years, its primary goal is to strengthen cybersecurity preparedness and response capabilities by exercising policies, processes and procedures for identifying and responding to a multi-sector cyber incident impacting critical infrastructure.
"Cyber Storm is our largest national exercise," said Freddura. He added that CISA uses Cyber Storm to collect feedback prior to a live incident, building the "trust, familiarity and muscle memory" required when public and private teams must collaborate under pressure.
Cyber Storm X represents two decades of accumulated lessons. CISA says the 2026 exercise will involve participants from federal departments and agencies, industry-specific partners from critical infrastructure sectors such as transportation and water, and state and local governments.
Over four days of live play, representatives from legal, crisis communications, IT, leadership functions and technical response will be divided into working groups to support planning and collaboration among specific communities of interest.
CIRCIA raises the stakes for incident response testing
The timing of Cyber Storm X coincides with CISA's push to finalize regulations under the Cyber Incident Reporting for Critical Infrastructure Act (CIRCIA). With CISA targeting a September 2026 final rule, CIRCIA mandates covered entities to report cyber incidents within 72 hours and ransomware payments within 24 hours.
The compressed windows make cross-functional incident response exercises an immediate operational priority. Meeting these windows requires pre-established internal governance -- defining who gathers technical facts, who approves regulatory reports, and how evidence is preserved.
Analysis: A CISO blueprint for cross-functional stress-testing
CISA guidance explicitly recommends that corporate cyber incident response plans include senior business leadership and board members, rather than being limited to security and IT teams. Its guidance also recommends exercising continuity plans for critical business functions and considering how an incident at a supply-chain partner could affect the organization.
Conventional incident response exercises test whether a security operations center can identify an intrusion, isolate affected systems and restore from backups, but they fail to resolve the existential governance questions that become vital during a large-scale incident:
- Authority. Who holds the power to shut down a revenue-generating business-critical system?
- Legal integration. At what precise moment does the general counsel assume control from the incident response team?
- Materiality. Who determines whether an incident triggers regulatory notification requirements?
- Crisis communications. Who manages the customer and public messaging when technical facts remain incomplete?
- Board governance. Who briefs directors on operational risks in real time?
Enterprise CISOs do not need to wait for national Cyber Storm findings to resolve these gaps. The most valuable adaptation is a cross-functional stress test -- moving beyond tabletop walkthroughs to inject real-world friction.
A red team exercise might begin with a routine credential compromise before layering on simultaneous developments: a key cloud vendor or software supplier reporting a breach, sensitive corporate data appearing on dark web forums or a cascading customer-facing outage.
At that point, the exercise moves beyond a SOC drill. Legal must weigh reporting liabilities under compressed CIRCIA timelines, crisis communications must stabilize external narrative, procurement must evaluate supplier exposure and executive leadership must decide which services to degrade.
This expanded scope gives a realistic cross-functional assessment of how a complex organization would act during a highly disruptive cyber incident unfolding in real time.
CISA says the Cyber Storm exercise is intended to strengthen relationships between public and private-sector partners so that participants can coordinate more effectively during a real incident. That expanded collaboration, and the catalyst for smaller-scale preparation for a worst-case scenario, provides a useful model for enterprise security leaders.
Richard Livingston is an editor for TechTarget Cybersecurity, covering news, trends and analysis. Livingston's professional background includes editorial positions in the national defense industry covering the U.S. Army Medical Department, as well as offensive and defensive cyber strategy for military and government audiences.
