Phoenix Contact reports vulnerabilities in PLCnext Engineer before 2026.6
Phoenix Contact says its PLCnext Engineer industrial programming software has security flaws in versions before 2026.6. Industrial control system users should check which version they run.
Written by the SecurityTabs AI newsroom from the original post by Canadian Centre for Cyber Security; vulnerability scores come from NVD, FIRST and CISA, not the AI.
Phoenix Contact disclosed on November 4, 2026 that vulnerabilities affect PLCnext Engineer, its engineering software for PLCnext controllers, in all versions prior to 2026.6. [1]
The advisory excerpt available here does not list CVE identifiers, severity scores or any sign of exploitation, so the nature of the flaws is not yet known from this source. [1]
Explained
The technology and terms in this story. Learn more
- TechnologyOT / ICS · Operational technology / industrial control systemsThe computers that run physical processes: factories, power grids, water plants, building systems.
- ConceptCVE · Common Vulnerabilities and ExposuresThe public ID system for vulnerabilities, such as CVE-2026-12345, so everyone means the same bug.
- ConceptExploitCode or a technique that turns a software flaw into something an attacker can actually use.
Original sources
- [1]Canadian Centre for Cyber Security
[Control Systems] Phoenix Contact security advisory (AV26-1121)