Critical Information Infrastructures Security: ... May 2026

: 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.

Protecting CII is complicated by several inherent weaknesses in how these systems were built and maintained: Key competencies for critical infrastructure cyber-security Critical Information Infrastructures Security: ...

: 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). : Persistent actors like "Volt Typhoon" maintain long-term

Critical Information Infrastructures Security: Safeguarding the Backbone of Modern Society Critical Information Infrastructures 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:

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.