Active enforcement of the EU's NIS2 Directive is driving automotive and logistics operators to overhaul their operational technology (OT) security, with private 5G network deployments emerging as a primary technical response to new supply chain security mandates.
Background
The NIS2 Directive entered into force on January 16, 2023, with member states required to transpose it into national law by October 17, 2024. Under the directive, transport and logistics operators are classified as essential entities-subject to the highest level of regulatory scrutiny-while automotive manufacturers are designated as important entities, with enforcement triggered by evidence of non-compliance. Both tiers face identical technical requirements, including mandatory incident reporting, supply chain risk management, and board-level accountability, with fines reaching up to €10 million or 2% of global revenue for essential entities.
National adoption has been uneven. As of May 2026, the European Commission has referred seven member states to the Court of Justice of the EU for failure to transpose NIS2. Germany transposed in December 2025; Spain's national law remained pending publication as of early 2026. Poland went further than the minimum directive requirements, reclassifying manufacturing-including food processing and chemical production-from "important" to "essential," imposing the stricter supervisory regime on those sectors. This divergence in national implementation creates compliance complexity for cross-border supply chains spanning multiple jurisdictions.
Details
For automotive and logistics OT networks, the directive's most demanding provisions center on supply chain accountability and incident response timelines. Under Article 21(2)(d), in-scope organizations must assess the cybersecurity posture of direct suppliers, including the quality and resilience of their products and development practices. In practice, this is driving OEMs to require cybersecurity questionnaires during vendor onboarding, incorporate security audit rights into contracts, and mandate incident notification procedures aligned to NIS2's 24-hour initial alert and 72-hour detailed reporting windows.
According to the SANS ICS Survey 2025, 60% of OT organizations reported a security incident in 2025-a figure that underscores why regulators are pressing for faster detection capabilities. Legacy OT environments in automotive plants and logistics hubs-built for availability rather than logging-struggle to meet these timelines. Meeting NIS2's incident reporting window is considered practically impossible using only manual audits, according to Schneider Electric's industrial security team.
Private 5G networks are positioned as a structural response to this detection gap. Automotive manufacturers including Mercedes-Benz have deployed private 5G at production facilities, with the company implementing a network at its Factory 56 in Sindelfingen in collaboration with Telefónica and Ericsson. Across early deployments, factories have adopted a segmented connectivity model: private 5G supports robotics, motion control, and mobile industrial assets; Wi-Fi serves lower-criticality endpoints; and wired Ethernet underpins the most safety-critical OT functions. Factories adopting private 5G are also strengthening SIM and eSIM lifecycle management, OT-IT segmentation policies, and anomaly detection as part of the transition.
The security case for private 5G centers on network isolation and data sovereignty. Sensitive production data remains within the private network perimeter, reducing exposure to external attack vectors. However, security specialists caution that private 5G introduces new risks: the automation it enables also allows adversaries to conduct automated reconnaissance of exposed infrastructure, and a single equipment compromise can cascade across all connected mission-critical systems.
Outlook
The practical technical standard underpinning NIS2 compliance in OT environments is IEC 62443, which provides the zone-and-conduit segmentation architecture and component-level security requirements that the directive's Article 21 mandates but does not technically prescribe. ENISA published its Technical Implementation Guidance (v1.0) in June 2025, mapping NIS2 obligations to control frameworks including IEC 62443, NIST CSF 2.0, and ISO 27001/27002, which national regulators now treat as primary evidence of compliance. For cross-border supply chains, the interoperability of these open standards is critical: they allow Tier 1 and Tier 2 suppliers operating across Germany, Italy, Poland, and other member states with divergent national implementations to demonstrate a consistent, auditable security posture to OEM customers. The EU Cooperation Group, ENISA, and national CSIRTs are expected to conduct more joint inspections and coordinated enforcement actions through 2026 and beyond. For plant managers and operations directors investing in router, gateway, and edge compute upgrades, aligning hardware refresh cycles with IEC 62443 certification requirements-and the forthcoming Cyber Resilience Act, whose enforcement begins in December 2027-represents the most efficient path to durable NIS2 compliance.
