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The UK National Cyber Security Centre (NCSC) warned that multiple state and non-state actors are increasingly targeting operational-technology (OT) environments worldwide, including in the United Kingdom. The activity has caused limited real-world disruption and is concentrated on systems exposed to the public internet, including OT assets accessible through misconfiguration, legacy management connections, and unmanaged edge devices.
The NCSC identified unsupported or end-of-life equipment, insecure industrial and management protocols, and unchanged default credentials as key exposure factors. It urged organisations to identify and remove public access to OT assets, segment OT from business and management networks, enforce strong authentication, maintain supported edge devices, protect controller logic from remote modification, continuously monitor connectivity, and test ransomware-resilient backup and recovery processes.
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The UK NCSC issued an advisory warning that multiple state and non-state actors had increasingly targeted operational-technology systems globally, including in the UK, causing limited real-world disruption. It highlighted internet-exposed OT assets, edge devices, legacy protocols, unmanaged equipment, and default credentials as key risks and urged organisations to strengthen OT security.
The NCSC published information with international partners on activity targeting poorly configured routers, which it later cited as related disruptive activity affecting internet-exposed systems.
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Government and industry reporting warns that operational technology and industrial control systems remain dangerously exposed through weak remote access, poor segmentation, and internet-facing devices, giving both state-backed and criminal actors paths into critical infrastructure. A joint **CISA/NSA** advisory said adversaries routinely exploit legacy OT environments, public system information, and insecure remote connections to move from reconnaissance to manipulation of physical processes, while a separate **CISA/FBI** alert tied Chinese state-sponsored intrusions to U.S. natural gas pipeline operators and said the actors stole SCADA and ICS information to build capabilities for future disruption. Recent exposure research also found **6,300** internet-reachable industrial-control and building-automation devices near U.S. data centers, including **BACnet**, **Fox/Niagara**, **Modbus**, and Vertiv/Liebert systems that could affect cooling and power operations. The threat has already translated into real-world disruptive activity and increasingly specialized tooling. Dragos reported **FrostyGoop**, a Golang-based ICS malware that communicates over **Modbus TCP** and was likely used to disrupt heating services in Lviv, Ukraine, after attackers apparently entered through an internet-facing router and traversed poorly segmented networks. Other cited incidents and assessments include Israel’s thwarted attempt against water facilities, persistent Russian probing of U.S. power infrastructure, and leaked-document analysis describing a Russian capability designed to attack rail and petrochemical control systems through telecommunications access. Across the reporting, the common defensive priorities were to eliminate direct public exposure, harden and inventory remote access, enforce MFA, replace default credentials, patch supported systems, restrict engineering tools, and closely monitor OT network and protocol activity.
Aug 15, 2026
CISA, the UK **NCSC**, and multiple international partners released **Secure Connectivity Principles for Operational Technology (OT)** guidance aimed at reducing risk created by increased connectivity into industrial environments (e.g., industrial control systems, sensors, and other critical services). The guidance is positioned for operators of essential services facing business and regulatory pressure to enable remote monitoring and management, and it emphasizes that formerly *air-gapped* OT is now more exposed due to expanded remote access and IT/OT convergence. The guidance highlights that insecure or exposed OT connectivity is being targeted by a broad range of adversaries, including **ransomware groups**, **state-backed actors**, and **pro-Russia hacktivists** conducting opportunistic attacks against global critical infrastructure. Recommended defensive themes include **network segmentation**, **strong authentication**, continuous monitoring, and minimizing remote access paths to prevent disruptive incidents with potential real-world safety and service-delivery impacts; CISA also solicited stakeholder feedback via a product survey. Separate opinion pieces discussing AI in critical infrastructure and power redundancy risks in OT, and an industry roundup of Chinese cybersecurity companies, do not provide additional reporting on this specific guidance release.
Jun 29, 2026
Security reporting and expert commentary warn that **operational technology (OT)** environments remain highly exposed due to fragile access controls and that attacker capability is trending toward more dangerous, process-aware operations. Lessons drawn from the 2015 **Ukraine power grid** disruption emphasize that remote connectivity, vendor access, and broad VPN permissions can become the “soft underbelly” of critical infrastructure, with recurring real-world examples of disruption tied to **misused remote access and stolen credentials** (including the **Colonial Pipeline** shutdown following a compromised password). The core takeaway is that OT systems are no longer “too specialized” to be targeted, and that common enterprise intrusion paths—credential compromise and remote access abuse—continue to translate into operational impact when they bridge into industrial environments. Separately, OT-focused threat analysis highlights early signs that attackers are gaining the “process comprehension” historically missing from many intrusions into industrial systems. A forthcoming RSA Conference 2026 presentation is expected to demonstrate **“living-off-the-plant”** techniques—analogous to living-off-the-land in IT—where adversaries leverage native industrial tooling and legitimate functions inside plants to blend in and potentially manipulate physical processes. The reporting argues that “security by obscurity” (attackers’ unfamiliarity with bespoke/legacy OT) has limited the severity of many incidents so far, but that this advantage is eroding as adversaries become more comfortable operating within industrial environments, increasing the risk of more consequential OT attacks.
Jun 29, 2026