Vulnerability Identification

The vulnerability identification requirement means you must consistently find and document vulnerabilities affecting your IT and OT assets, including software flaws, misconfigurations, and architectural weaknesses. To operationalize it, build an asset-scoped intake of vulnerability signals, triage and validate findings, record them in a system of record, and prove coverage through repeatable evidence. ¹

Key takeaways:

• You need documented, repeatable discovery of vulnerabilities across both IT and OT assets, not ad hoc scanning. ¹
• “Identified and documented” requires a durable record with asset context, severity, status, and ownership. ¹
• Auditors will look for coverage (what’s in scope), consistency (how you find issues), and traceability (evidence from discovery to documentation). ¹

“Vulnerability Identification” sounds straightforward until you run it in a mixed IT/OT environment. IT teams often rely on scanners and patch tooling; OT teams may rely on vendor advisories, engineering judgment, and strict change control. The requirement in C2M2 THREAT-2.A (MIL1) is intentionally baseline: vulnerabilities of IT and OT assets are identified and documented. ¹

For a CCO or GRC lead, the goal is fast operational clarity: what must exist, who must do it, what proof you need, and what examiners typically challenge. This page translates the requirement into an implementable workflow that works across enterprise IT, industrial control systems, and third-party-supported assets. It also helps you avoid common failure modes, like “we scan, therefore we comply,” or “OT is excluded because it’s fragile.”

A practical implementation ties together: (1) a defined scope of IT/OT assets, (2) multiple vulnerability inputs (scanning plus human and supplier sources), (3) triage and validation, and (4) documentation in a system that produces audit-ready reporting. Tools can help, but the control is the process and evidence.

Regulatory text

Requirement (C2M2 THREAT-2.A, MIL1): “Vulnerabilities of IT and OT assets are identified and documented.” ¹

Operator interpretation: you must have a repeatable way to discover vulnerabilities affecting assets in scope and create/maintain records of those vulnerabilities. Documentation is not optional; it is part of the requirement. ¹

Plain-English interpretation (what counts as a “vulnerability” here)

For operational purposes under this requirement, treat “vulnerability” as any weakness that could be exploited or could cause loss of confidentiality, integrity, or availability, including:

• Known software vulnerabilities (e.g., CVEs applicable to installed versions). ¹
• Misconfigurations (e.g., exposed management interfaces, weak authentication, insecure protocols enabled). ¹
• Architectural weaknesses (e.g., flat networks, trust boundaries that allow lateral movement into OT). ¹

Who it applies to

Entities

C2M2 is used by energy sector organizations and critical infrastructure operators and their supporting environments, including corporate IT and operational technology. ¹

Operational context (where it bites in practice)

You should treat this requirement as applying across:

• Corporate IT: endpoints, servers, network gear, cloud workloads, identity systems, business applications.
• OT/ICS: HMIs, historians, engineering workstations, PLCs, RTUs, protective relays (where applicable), OT network devices, remote access pathways, and OT management tooling.
• Third-party-supported systems: assets managed or maintained by a third party still require your visibility into vulnerabilities affecting them, even if remediation is contractually delegated.

What you actually need to do (step-by-step)

Below is a practical implementation flow that satisfies “identify and document,” with OT-specific guardrails.

1) Define scope using an asset inventory boundary

You cannot prove vulnerability identification without a defined asset population.

• Confirm your IT asset inventory and OT asset inventory (even if OT starts “good enough”).
• Tag assets with minimum fields: owner, environment (IT/OT), location/zone, criticality tier, and whether scanning is allowed.
• Write down explicit scope inclusions and exclusions (e.g., “safety controllers are not actively scanned; vendor advisories and passive monitoring used”).

Evidence tip: a scope statement plus an asset list snapshot is often more persuasive than a diagram alone.

2) Establish approved vulnerability input sources (multiple, not one)

At MIL1 maturity, a single scanner is rarely enough, especially for OT. Build an intake list such as:

• Authenticated vulnerability scanning (where allowed).
• Passive discovery / OT monitoring outputs (if used).
• Patch and configuration compliance tooling findings.
• Vendor/supplier security advisories for OT components and embedded systems.
• Penetration test findings and red team reports (if performed).
• Internal security reviews of architectures and network segmentation.
• Incident/post-incident findings.

Map each input to which asset classes it covers. If OT cannot be scanned, you still need a defined alternative signal path and documentation process. ¹

3) Normalize findings into a single “system of record”

Documentation means you can produce a durable record, not a screenshot in a ticket comment. Minimum fields your record should contain:

• Unique ID
• Asset or asset group mapping (host, application, device type, zone)
• Vulnerability description (CVE where applicable, or misconfiguration statement)
• Detection source and date discovered
• Severity (your method, consistently applied)
• Status (new, triaged, accepted risk, in remediation, resolved)
• Owner (IT ops, OT engineering, app team, third party)
• References (scanner output, advisory link, configuration evidence)

Many teams use a vulnerability management platform, GRC issue register, or ITSM. Daydream can help by standardizing evidence capture and linking findings to controls and asset scope, so audits do not become a spreadsheet scavenger hunt.

4) Triage: validate, de-duplicate, and assign

Your process needs a human decision point:

• Validate applicability (false positives happen; OT models and firmware versions matter).
• Deduplicate (same CVE across many hosts should roll up for management reporting, while preserving asset-level traceability).
• Assign ownership and due dates aligned to operational constraints (OT outage windows, safety approvals).

Document the triage decision, especially when you mark a finding as “not applicable” or “accepted risk.” Those are common audit hangups.

5) OT-safe handling: coordinate with engineering and change control

For OT, “identify” cannot mean “break it with scans.”

• Maintain a list of OT segments where active scanning is approved versus prohibited.
• Require engineering sign-off for new scanning profiles or credentialed checks.
• Where scanning is restricted, rely on a blend of passive monitoring, vendor advisories, and configuration baselines, and document that rationale.

6) Reporting: prove coverage, not just volume

Build two recurring views for governance:

• Coverage view: % of in-scope assets with a vulnerability signal path (scanner coverage, advisory mapping, passive monitoring coverage). If you cannot quantify, provide a documented coverage narrative by asset class.
• Findings view: top open items by criticality tier, OT vs IT split, aging buckets (avoid numbers unless your program measures them consistently), and “accepted risk” inventory.

Required evidence and artifacts to retain

Auditors typically accept different formats, but they want traceability. Retain:

• Vulnerability identification procedure (who, what sources, how often you run them, how OT constraints are handled).
• Asset inventory extract(s) showing IT and OT scope tags.
• Tool configurations: scanner profiles, credential management approach (high level), scan scope lists, exclusions with approvals.
• Sample raw outputs (scanner report, passive monitoring export, vendor advisory) tied to recorded findings.
• Vulnerability register/system-of-record export showing required fields and lifecycle status.
• Triage/validation notes for edge cases (false positives, not applicable, compensating controls, risk acceptance approvals).
• Governance artifacts: meeting minutes or sign-offs that demonstrate the process runs (security-ops-OT coordination).

Common exam/audit questions and hangups

Expect these:

1. “Show me your OT vulnerability identification method.” If your answer is “we don’t scan OT,” the next question is “then how do you identify vulnerabilities?” ¹
2. “What assets are in scope?” Missing asset scope undermines every other claim.
3. “Where is it documented?” Tickets alone often fail because they do not provide consistent fields and reporting.
4. “How do you handle vendor-managed systems?” You still need documented visibility and a way to record vulnerabilities that affect your environment.
5. “How do you prove this is repeatable?” One-off assessment reports do not show an operating process.

Frequent implementation mistakes (and how to avoid them)

• Mistake: Confusing remediation with identification. You can be strong at patching but weak at documenting findings. Fix: enforce a record for every validated vulnerability, even if it is immediately remediated.
• Mistake: OT carve-out with no alternative. “We don’t scan OT” is not a program. Fix: define advisory intake, passive monitoring, and configuration baseline reviews for OT, and document the constraints and approvals.
• Mistake: No de-duplication strategy. Thousands of duplicate findings hide the real risk. Fix: roll up by vulnerability + asset group for governance, keep asset-level traceability for proof.
• Mistake: Relying on screenshots. Screenshots do not scale and do not show lifecycle status. Fix: exportable records with IDs, timestamps, and ownership.
• Mistake: Third party blind spot. If a third party manages your remote access gateway or OT maintenance laptop, you still need vulnerability visibility. Fix: contract language and reporting requirements, plus internal recording of what they report.

Enforcement context and risk implications

No public enforcement cases were provided in the supplied sources for this specific C2M2 requirement. Practically, weak vulnerability identification increases the chance that known weaknesses persist undetected in both enterprise IT and OT pathways. In critical infrastructure, that translates to higher operational disruption risk, harder incident containment, and weaker governance defensibility.

Practical 30/60/90-day execution plan

First 30 days (Immediate)

• Publish a one-page vulnerability identification standard: scope, sources, documentation fields, OT constraints, and ownership. ¹
• Reconcile IT and OT asset scope lists and tag “scannable vs non-scannable.”
• Select your system of record (VM tool, ITSM, GRC register). Define required fields and a minimum workflow status set.

By 60 days (Near-term)

• Stand up vulnerability intake feeds: scanning where allowed, advisory monitoring for OT suppliers, and a documented manual intake path for architecture/misconfiguration findings. ¹
• Run initial triage sessions with IT ops and OT engineering. Document decisions, especially exclusions and “not applicable.”
• Produce your first coverage view by asset class, with explicit gaps and planned closures.

By 90 days (Stabilize and prove repeatability)

• Make the process routine: scheduled scans/reviews, advisory review cadence, and monthly (or other defined) governance reporting.
• Audit your own evidence: pick samples from IT and OT and verify you can trace from asset → detection source → documented record → current status.
• If you use Daydream, automate evidence capture and mapping so you can answer “show me” requests in minutes, not days.

Frequently Asked Questions

Do we have to run vulnerability scans to meet the vulnerability identification requirement?

The requirement is to identify and document vulnerabilities across IT and OT assets. ¹ Scanning is a common input, but OT constraints may require vendor advisories, passive monitoring, and configuration reviews as documented alternatives.

What does “documented” mean in an audit?

It means you can produce a durable record of identified vulnerabilities with asset context, dates, source, status, and ownership. ¹ Ad hoc emails or screenshots usually fail because they do not provide consistent traceability.

How do we handle OT assets we cannot actively scan?

Write down the constraint, get engineering approval on the approach, and use alternative sources such as supplier advisories and passive monitoring, then record the resulting vulnerabilities in the same system of record. ¹

Are misconfigurations really part of “vulnerability identification”?

Yes. The plain-language summary includes misconfigurations and architectural weaknesses as vulnerabilities that must be identified and documented. ¹

If a third party operates the system, can we rely on their reports?

You can rely on their reporting as an input, but you still need your own documentation that vulnerabilities affecting your IT/OT assets were identified and recorded, with clear ownership and status. ¹

What is the minimum “good enough” outcome for MIL1?

You can show a defined scope of IT and OT assets, a repeatable set of vulnerability inputs, and a documented register of identified vulnerabilities with traceability to evidence. ¹

Footnotes

1. Cybersecurity Capability Maturity Model v2.1