Glossary · Engineering, integration and validation
Penetration test (OT)
Also known as: OT pentest, OT penetration testing
German: Penetrationstest (Pentest) im OT-Umfeld
In industrial cybersecurity, a penetration test in the OT environment is an authorized, planned attempt to find and exploit vulnerabilities in operational technology, such as controllers, HMIs, networks and remote access, to assess how an attacker could compromise the system. It is performed with methods that avoid disturbing the physical process.
- Validation
- OT security
In one sentence
An OT penetration test is an authorized attempt to find and exploit vulnerabilities in controllers, HMIs and networks without disturbing the process.
Example
Before handover, an external team performs a penetration test on the line's test bench and finds that the HMI still accepts a default password.
How it applies
- Engineering: IEC 62443-4-1 includes penetration testing in the security verification and validation of products. System integrators and plant owners also commission tests of complete systems.
- Operation: Tests on running plants need careful scoping, agreed time windows and coordination with operations, because scans or exploits can disrupt controllers. Many teams test on a Test bench, a twin system or during shutdowns.
- Maintenance: Findings feed into remediation such as Patch management, hardening and network segmentation; retests confirm the fixes.
- Documentation: The documentation team treats reports as confidential, tracks findings to closure and updates security guidance for users, such as required settings and hardening steps.
Penetration test vs. vulnerability scan
A vulnerability scan automatically lists known weaknesses. A penetration test goes further: testers try to exploit weaknesses and combine them, as an attacker would. A passed pentest shows that the testers found no path within the agreed scope and time; it does not prove the system is secure.