Critical Information Infrastructure (CII) refers to the computer resources, networks, and digital assets so vital that their incapacitation or destruction would have a debilitating impact on national security, the economy, public health, or safety. As we move further into 2026, these systems—ranging from electrical grids and water treatment plants to financial networks and telecommunications—are facing an unprecedented era of disruption.
: Persistent actors like "Volt Typhoon" maintain long-term access inside infrastructure, using "living-off-the-land" (LOTL) techniques to stay undetected and ready for activation during a future crisis. Critical Information Infrastructures Security: ...
: Adversaries now routinely use Large Language Models (LLMs) to craft hyper-personalized phishing and plausible deepfakes, achieving significantly higher compromise rates than traditional methods. : Adversaries now routinely use Large Language Models
: Over 97% of identity-based attacks target password-based authentication. Attackers now use legitimate credentials to bridge the gap between enterprise IT and operational technology (OT). : Beyond cyber, the increasing intensity of extreme
: Beyond cyber, the increasing intensity of extreme weather—hurricanes, floods, and wildfires—poses a direct physical threat to aging infrastructure. 2. Key Vulnerabilities in Critical Systems
Protecting CII is complicated by several inherent weaknesses in how these systems were built and maintained: Key competencies for critical infrastructure cyber-security
The "air-gapped" isolation of the past is gone. Today’s threat landscape is defined by five structural realities that are reshaping resilience priorities: