Legacy OT Equipment Hinders Visibility, Drives Breaches for Critical Infrastructure Operators
What Happened — A Palo Alto Networks survey of 1,600 security and operations leaders shows that 52 % of critical‑infrastructure operators cite legacy OT equipment as the top visibility problem, and 42 % flag unpatchable legacy gear as their biggest cyber‑risk. Despite an average of seven security tools per organization, 59 % still cannot see every asset, and 59 % reported a significant breach in the past year.
Why It Matters for Trust & Control Assurance
- Incomplete asset inventories breach the “asset management” control objective that underpins continuous control‑assurance programs across NIST CSF, ISO 27001, and other frameworks.
- The gap forces operators to layer tools without a unified evidence base, eroding the defensible audit trail needed for regulators and insurers.
- Mapping legacy‑equipment risks to a single, auditable control area enables continuous monitoring and faster incident containment.
Who Is Affected — Energy & utilities, manufacturing, transportation, and other critical‑infrastructure sectors that rely on operational technology (OT).
Recommended Actions
- Conduct a formal asset‑inventory audit that includes unpatchable legacy devices and map findings to the “asset management” control objective.
- Deploy a unified control‑mapping platform to collect, correlate, and retain evidence of asset visibility and remediation status for audit readiness.
Technical Notes — The survey highlights legacy hardware that cannot be patched, fragmented tooling, and a 15 % improvement in automated incident containment. No specific CVEs or malware families are identified. Source: Help Net Security