Operational Technology controls physical processes, so cyber risks can disrupt safety, reliability, and availability across connected industrial systems.
Search across headline titles and summaries.
Background for this topic.
Operational technology (OT) comprises hardware and software that monitor and control physical processes—such as PLCs, RTUs, HMIs, SCADA, and DCS—in manufacturing, utilities, transport, and buildings. Its assets include controllers, sensors, actuators, engineering workstations, and the networks linking them. OT depends on precise timing, reliable communications, and safe states; outages or incorrect commands can stop production or affect physical safety, even when little sensitive data is involved.
Security concerns arise where OT connects to enterprise networks, vendor remote-access paths, or internet-facing services. Legacy protocols and long-lived devices may lack authentication, encryption, logging, or practical patching options. A compromise could alter setpoints, inhibit alarms, or disrupt availability, but impact depends on process design and safeguards. Defenders typically segment control networks, restrict and monitor remote access, maintain asset and dependency inventories, use passive monitoring where active scanning is risky, and test recovery and safe manual operation. Vulnerability management must account for maintenance windows, vendor support, and safety validation rather than treating every patch like IT.
To prevent these attacks, businesses must have complete visibility into, and access and management over, disparate devices.
Nigel Stanley and other security leaders discussed how to manage OT system risks
Culture of ‘insecure-by-design’ security is cited in discovery of bug-riddled operational technology devices.
Deep-dive study unearthed security flaws that could allow remote code execution, file manipulation, and malicious firmware uploads, among other badness.
Nearly five dozen security vulnerabilities have been disclosed in devices from 10 operational technology (OT) vendors due to what researchers call are "insecure-by-design practices." Collectively dubbed OT:ICEFALL by Forescout, the 56 issues span as many as 26 device models from Bently Nevada, Emerson, Honeywell, JTEKT, Motorola, Omron, Phoenix Contact, Siemens, and Yokogawa
A security report has been published on a set of 56 vulnerabilities that are collectively called Icefall and affect operational technology (OT) equipment used in various critical infrastructure environments. [...]
Forescout warns of widespread “insecure-by-design” practices
Nearly 60 holes found affecting 'more than 30,000' machines worldwide Fifty-six vulnerabilities – some deemed critical – have been found in industrial operational technology (OT) systems from ten global manufacturers including Honeywell, Ericsson, Motorola, and Siemens, putting more than 30,000 devices worldwide at risk, according to the US government's CISA and private security researchers. …