How often should OT systems be patched?
The patch frequency depends on the criticality of the system, the vendor support, the regulatory requirements, and the operational risk.
OT Patch Management
OT patch management services for pharmaceutical manufacturers. The engagement covers the patch identification, the patch assessment, the patch testing, the patch deployment, the validation, and the integration with the change control routine.
Patch identification
The patch identification covers the vendor advisories, the ICS-CERT advisories, the CISA advisories, the threat intelligence feeds, and the internal vulnerability scans.
Patch testing
The patch testing covers the impact assessment, the test plan, the test execution, the regression test, and the production readiness.
Patch deployment
The patch deployment covers the maintenance window, the production schedule, the backup, the deployment, the verification, and the documentation.
How to use this page
Use this OT Patch Management page as a planning checkpoint before vendor selection, architecture review, validation scoping or implementation sequencing. The strongest next step is to compare the guidance with your current SOPs, system inventory, batch records, data flows and QA review routines so the discussion starts from evidence instead of assumptions.
Evidence to prepare
For OT Patch Management, prepare the records, owners, risks and decision criteria linked to patch identification, patch testing, patch deployment. Useful evidence includes current process maps, interface lists, audit trail expectations, exception workflows, data retention rules and the business reason for changing the current operating model.
Frequently asked questions
How is the OT patch management validated?
The OT patch management is validated per the GxP validation strategy.