Industrial IoT Security: Rising Threats and the Need for Integrated IT/OT Protection – Part 1

Industrial IoT Security: Rising Threats and the Need for Integrated IT/OT Protection – Part 1

By Trevor Daughney, VP of Product Marketing at Exabeam

The Fourth Industrial Revolution is unlocking a wealth of opportunities as organizations adopt a new generation of connected Industrial Internet of Things (IIoT) devices. Enhanced data sharing, operational efficiencies, and productivity gains are now within reach. However, this digital shift also exposes critical infrastructure to a growing suite of cyber threats.

Smart Cities, Smart Health, Smart Factories

Across the globe, cities are deploying “smart” technologies—connecting power grids, transport systems, and public services—to improve quality of life. Healthcare is rapidly integrating IoT for streamlined care delivery, while manufacturers are scaling smart‑factory initiatives that rely on programmable logic controllers (PLCs), embedded systems, and a broad array of IoT sensors.

These connected operational technologies (OT) are becoming the backbone of modern business and critical infrastructure. Yet the rapid proliferation of these devices has opened a new attack surface for malicious actors.

Why OT is a Prime Target

A 2019 study by the Ponemon Institute shows that OT environments—such as those managing electricity and water utilities—are now top targets for cyber attackers seeking severe damage. The study found that 54% of utility companies expected an attack in 2020, underscoring the urgent need for robust cyber resilience.

Similarly, a recent report from Deloitte and the Manufacturers Alliance for Productivity and Innovation (MAPI) highlights the growing menace of cyber threats as manufacturing firms converge IT and OT across their operations.

The Trouble with Digital Transformation

Historically, legacy control systems operated in isolation, which reduced attack likelihood and made defenses easier. This isolation bred complacency and the myth that industrial assets were immune if kept off the internet.

The Stuxnet worm, which targeted an Iranian nuclear facility by reprogramming centrifuges, shattered that illusion. Designed to bypass conventional network security, Stuxnet demonstrated that IP‑based connectivity can expose even highly specialized industrial equipment to sophisticated attacks.

While IIoT devices simplify operations, they also become soft targets for global cyber threats—just like standard IT devices—making security a top priority.

Bridging the IT‑OT Divide

Cyberattacks now target IT assets that support OT systems—computers, mobile devices, networks—leading to potential hijacking of control systems and physical damage. Physical outages and data loss are tangible consequences of such breaches.

Until now, IT and OT have operated in silos. As organizations integrate IIoT into their existing IT infrastructure, a unified security strategy is essential. Integrated visibility into vulnerabilities across the entire digital estate is the only way to prevent infiltration that could compromise critical infrastructure.

Next Steps: Industrial Cybersecurity in Action

From automotive to smart cities to big pharma, every sector that relies on IIoT must assess exposure and enhance detection, response, and mitigation capabilities. Securing IIoT devices is challenging because they differ fundamentally from traditional IT equipment and were never built with security management tools in mind.

In the next article, we will explore these challenges in depth and outline frameworks and solutions that help organizations implement effective industrial cybersecurity.

The author is Trevor Daughney, Vice President of Product Marketing at Exabeam.