OT Vulnerability Assessment and Configuration Analysis
Average company has 127 unpatched CVEs in OT environment. Each is a potential entry point for attack. We'll identify vulnerabilities in PLCs, SCADA, HMI safely for production. You get a prioritized list for remediation.
What is OT Vulnerability Assessment and Configuration Analysis?
OT Vulnerability Assessment uses passive network monitoring via SPAN port and read-only configuration reviews to identify CVEs, firmware weaknesses, and hardening gaps in PLCs, SCADA, and HMI systems — without sending a single active packet that could disrupt production. nFlo correlates findings against CVSS, CISA Known Exploited Vulnerabilities, and business impact to produce a prioritized remediation plan; the average industrial OT environment carries 127 unpatched CVEs.
You can't patch what you don't know about
Safe OT vulnerability identification
Passive Scanning
Scanning without impacting devices
Configuration Audit
Hardening and settings analysis
Risk Prioritization
What to fix first
Known CVE Vulnerability Exploited in Attack
Energy facility with Schneider Electric SCADA systems. Attack exploited CVE-2021-22779 (public for 18 months, CVSS 9.8). Company didn’t know the vulnerability affected their systems. Attacker gained HMI access and modified readings. Detected after 3 weeks by chance during maintenance.
Without regular OT vulnerability assessment:
- You don’t know which CVEs affect your systems
- Attackers know your gaps better than you do
- No prioritization - you don’t know what to patch first
- Outdated firmware with critical vulnerabilities
Find and Fix Before Attackers Exploit
We identify vulnerabilities in your OT environment using methods safe for production. Passive scanning, configuration analysis, CVE database correlation. We prioritize by real risk to your business.
What you get:
- Passive inventory of all OT devices on network
- Firmware/software version identification and CVE comparison
- Hardening configuration analysis for PLC, SCADA, HMI
- Default password and weak credential verification
- Patch status assessment - what’s patched, what needs update
- Risk prioritization (CVSS + business impact + exploitability)
- Specific remediation recommendations with workarounds
- Compliance report - mapping to IEC 62443 and NIS2
Who Is It For?
This service is for you if:
- You don’t know what vulnerabilities you have in OT systems
- You must meet NIS2 vulnerability management requirements
- You worry about attacks exploiting public CVEs
- You need prioritization of what to fix first
- You’re planning OT patching and want to know where to start
Assessment Methodology
How We Scan OT Safely?
We use only methods safe for industrial environment:
Passive Network Monitoring
- SPAN port on OT switch - zero impact on traffic
- Deep packet inspection of OT protocols (Modbus, S7, DNP3, etc.)
- Device, firmware version, communication identification
- No active scans that could hang PLCs
Configuration Analysis
- Read-only access to SCADA servers
- PLC configuration backup analysis
- HMI station and engineering workstation review
- OS hardening assessment
CVE Correlation
- Firmware version mapping to known CVE
- Prioritization by CVSS + CISA KEV
- Exploitability analysis - is exploit public
- Business impact assessment - impact on your production
Risk Prioritization
Risk Score = CVSS x Exploitability x Business ImpactWhich Vulnerabilities to Fix First?
We prioritize by:
- Critical + Actively Exploited - CISA Known Exploited Vulnerabilities
- Critical + Public Exploit - easy for attackers to exploit
- High + High Business Impact - major impact on your production
- Medium + Easy Fix - quick wins without downtime
- Remaining - by CVSS and feasibility
Related Glossary Terms
Learn more about key concepts related to this service:
Contact your account manager
Discuss OT Vulnerability Assessment and Configuration Analysis with your dedicated account manager.
How we work
Our proven service delivery process.
Asset Discovery
Passive OT device inventory
Vulnerability Scan
CVE and misconfiguration identification
Risk Assessment
CVSS + business impact evaluation
Remediation Plan
Prioritized remediation plan
Benefits for your business
What you gain by choosing this service.
Know What to Fix
Vulnerability list with priorities
Lower Attack Risk
Close known gaps exploited by attackers
No Downtime
Scanning doesn't impact production
Budget Optimization
Know where to invest in security
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Read more →Frequently Asked Questions
Common questions about OT Vulnerability Assessment and Configuration Analysis.
Will vulnerability scanning disrupt production systems?
No. We use exclusively passive methods - monitoring via SPAN port on the OT switch, without active scans. Deep packet inspection of Modbus, S7, DNP3 protocols is performed without sending packets to PLC/SCADA devices.
How long does an OT vulnerability assessment take and what do I receive?
The assessment takes 1-2 weeks. We deliver an OT device inventory, a CVE list with prioritization (CVSS + business impact + exploitability), hardening configuration analysis, and a remediation plan with workarounds for systems that cannot be patched.
What if I can't patch a discovered vulnerability because the system must run 24/7?
For each vulnerability we provide compensating controls - e.g., network segmentation, anomaly monitoring, restricted remote access. Not all CVEs require a patch; often configuration changes without downtime are sufficient.
How often should we conduct an OT vulnerability assessment?
We recommend at least once every 12 months and after every major change in OT infrastructure. NIS2 requires regular vulnerability management - an annual cycle is the minimum for compliance.