NIS2 and OT Security: Why SBOM Visibility Is Becoming Essential for Industrial Environments

Industrial organizations across Europe are entering a new phase of cybersecurity regulation.

With the NIS2 Directive coming into force across EU member states, cybersecurity is no longer limited to traditional IT environments. Operational Technology (OT), industrial automation and connected devices are now directly in scope.

For many organizations, this represents a major shift.

Factories, energy infrastructure, transportation systems and industrial facilities were historically designed around availability, reliability and safety. Cybersecurity often evolved later, resulting in environments with limited visibility into the software and hardware components running inside critical equipment.

Under NIS2, that is becoming a serious operational and compliance challenge.

OT environments were never designed for modern vulnerability management

Most industrial environments contain a complex mix of:

• PLCs
• HMIs
• Industrial gateways
• SCADA systems
• Embedded Linux systems
• Legacy Windows environments
• Proprietary firmware
• Third-party supplier equipment

Many of these systems have operational lifecycles of 10 to 20 years.

At the same time, the attack surface continues to grow due to:

• Remote maintenance access
• Increased IT/OT integration
• Cloud connectivity
• Supplier integrations
• Connected industrial IoT devices

The result is that organizations often struggle to answer fundamental cybersecurity questions such as:

• Which software components are running inside our OT equipment?
• Which vulnerabilities affect our industrial devices?
• Which systems are exposed to known exploits?
• Which suppliers introduce cybersecurity risk?
• How quickly can we assess exposure during a newly disclosed vulnerability?

This lack of visibility creates both operational risk and compliance risk under NIS2.

Why NIS2 changes the conversation for OT

NIS2 introduces stricter cybersecurity obligations for organizations operating in critical and important sectors.

This includes requirements for:

• Risk management
• Vulnerability handling
• Supply chain security
• Incident response
• Business continuity
• Cybersecurity governance

For OT environments, one of the most important implications is the expectation that organizations can actively identify and manage vulnerabilities affecting operational systems.

This is difficult without structured visibility into device composition.

That is where SBOMs and HBOMs become increasingly important.

SBOMs are becoming essential for industrial cybersecurity

A Software Bill of Materials (SBOM) provides an inventory of software components inside a device or system.

In OT environments, this may include:

• Open source libraries
• Operating systems
• Embedded software components
• Third-party packages
• Firmware dependencies
• Middleware

For example, a PLC or industrial gateway may contain:

• Embedded Linux
• OpenSSL
• BusyBox
• Proprietary firmware modules
• Communication stacks
• Additional third-party libraries

Without SBOM visibility, organizations may not know that a newly disclosed vulnerability affects critical industrial equipment already deployed inside operational environments.

This became highly visible during incidents such as:

• Log4Shell
• OpenSSL vulnerabilities
• Major supply chain vulnerabilities impacting embedded systems

Industrial operators increasingly need the ability to quickly determine:

• Which devices are affected
• How severe the exposure is
• What mitigation actions are required

Managing SBOMs for industrial equipment

One of the growing challenges in OT cybersecurity is managing SBOMs for equipment from multiple vendors.

Industrial environments often include devices from manufacturers such as:

• Siemens
• Schneider Electric
• Rockwell Automation
• Smaller embedded or industrial suppliers

Each vendor may provide different levels of transparency regarding:

• Software composition
• Firmware updates
• Vulnerability disclosures
• Lifecycle support

Organizations therefore need a centralized approach to:

• Maintain device models
• Track software and hardware components
• Monitor vulnerabilities continuously
• Assess operational exposure

How ARIANNA supports NIS2 readiness for OT environments

ARIANNA is designed to help organizations manage vulnerabilities in embedded, IoT and OT environments where traditional IT-centric vulnerability management approaches are often insufficient.

ARIANNA enables organizations to:

• Maintain device models for industrial and embedded equipment
• Manage SBOMs and HBOMs
• Continuously monitor vulnerabilities
• Track exposure over the full device lifecycle
• Improve cybersecurity governance for connected systems

For OT environments this helps organizations:

• Improve visibility into industrial assets
• Identify affected systems during new CVE disclosures
• Support incident response activities
• Strengthen supplier risk management
• Prepare for regulatory obligations under NIS2 and CRA

NIS2 is accelerating long-term OT cybersecurity maturity

NIS2 is not simply another compliance requirement.

It is accelerating a broader shift in how organizations approach cybersecurity in operational environments.

Industrial cybersecurity is moving toward:

• Continuous monitoring
• Lifecycle vulnerability management
• Supply chain transparency
• Structured governance

Organizations that invest early in visibility, SBOM management and OT-focused vulnerability management will be significantly better positioned to handle both operational risk and evolving regulatory expectations.

The reality is simple: you cannot protect what you cannot see.