What Security Risks Does IT/OT Convergence Create?
IT/OT convergence's primary security risk is the introduction of IT attack vectors into OT environments. Before convergence, attacking an OT system required physical access or a specialized attack vector (like Stuxnet's use of USB drives to cross air gaps). After convergence, IT-originated attacks including ransomware, phishing-delivered malware, credential theft, and supply chain software attacks can reach OT systems through network connections. Dragos documented 96% of OT incidents using IT network paths in 2024, a direct consequence of convergence without adequate security architecture ([Dragos, 2024](https://www.dragos.com/year-in-review/)).
The second convergence risk is the expansion of the OT attack surface through connected devices. Every endpoint added to a converged network, whether an industrial sensor, a gateway device, a SCADA workstation, or a vendor remote access system, is a potential entry point. Connected device inventories in industrial environments are frequently incomplete: Claroty's research found an average of 27% more OT-connected devices in industrial environments than the operators were aware of, a phenomenon called shadow OT.
Citation Capsule: IT/OT convergence has transformed the OT threat landscape. More than 70% of industrial organizations connected OT to corporate IT or the internet by 2024, and Dragos documents that 96% of OT security incidents now use IT network paths into OT environments, a direct consequence of convergence without security architecture adequate to the connected model ([Dragos, 2024](https://www.dragos.com/year-in-review/); [Claroty, 2024](https://claroty.com/team82/research)).
How Does IT/OT Convergence Affect Industrial Operations?
Beyond security, IT/OT convergence creates operational management challenges. IT change management cycles are measured in weeks. OT change management cycles are measured in months or years, because OT changes must be validated against process safety and production reliability requirements before deployment. When IT and OT teams operate under different change management disciplines, conflict arises: IT patches that need to be applied urgently for security reasons may require extended operational validation before deployment in OT environments.
Governance structures for converged IT/OT environments must address this tension explicitly. The most effective approach creates a joint IT/OT change advisory board that reviews all changes with cross-boundary impact, sets priority frameworks for security vs. operational stability trade-offs, and has authority to approve emergency change procedures for critical security issues that can't wait for standard OT change management timelines.
Frequently Asked Questions
What is the difference between IT and OT?
IT (information technology) systems process, store, and transmit data, including servers, networking equipment, and enterprise applications. OT (operational technology) systems monitor and control physical processes, including PLCs, RTUs, SCADA, DCS, and HMIs. IT systems prioritize data confidentiality and integrity. OT systems prioritize availability and real-time performance. A wrong IT configuration might cause data loss. A wrong OT configuration might cause equipment damage, production loss, or safety events.
Is IT/OT convergence avoidable?
For most industrial organizations, complete separation of IT and OT is no longer operationally viable. Business requirements for operational data, remote access, and vendor connectivity drive convergence regardless of security preferences. The practical goal is not to avoid convergence but to implement it with security architecture that matches the connectivity model: DMZ-based boundaries, monitored conduits, access controls, and anomaly detection appropriate to the scale of IT/OT interconnection.
What governance model works for converged IT/OT?
Effective IT/OT convergence governance requires shared ownership between the CISO (who owns IT security), the VP of Operations or Chief Operations Officer (who owns OT availability and safety), and engineering leadership (who understands process and control system requirements). A joint IT/OT security steering committee meeting monthly, with representation from all three functions, is the most common model for effective convergence governance in mid-to-large industrial organizations.
Conclusion
IT/OT convergence is both inevitable and beneficial for most industrial organizations. The operational data value, remote operations efficiency, and digital transformation capabilities it enables are real competitive advantages. The security risks it creates, primarily the introduction of IT attack paths into OT environments, are equally real and require deliberate architecture to manage.
Organizations that implement convergence without designing the security architecture first end up with the worst of both worlds: operational benefits that are vulnerable to disruption, and security complexity that neither IT nor OT teams are equipped to manage independently. The answer is joint ownership, deliberate architecture, and security controls matched to the connectivity model that convergence creates.
