IT Operations & Cybersecurity Encyclopedia
NIST CSF Identify function evidence guide
The NIST CSF Identify function helps organizations understand what they have, what matters, who owns it, and where risk exists. Practical Identify evidence includes asset inventory, data classification, business dependencies, vendor records, vulnerabilities, risk register, owners, and review cadence.
NIST CSF IdentifyAsset inventoryData classificationVendor riskRisk register
Why it matters
Build the evidence foundation for cybersecurity decisions
Cybersecurity planning becomes guesswork when an organization cannot identify critical systems, sensitive data, users, vendors, dependencies, vulnerabilities, and owners.
The Identify function creates the evidence foundation for prioritizing controls, funding projects, responding to incidents, managing vendors, and explaining risk to leadership.
This guide is practical evidence guidance. It does not replace a full cybersecurity audit, compliance assessment, data discovery project, vendor risk program, or professional risk assessment.
Practical rule: Every Identify evidence item should have a source of truth, owner, last reviewed date, confidence level, related business process, and known gaps or exceptions.
Review scope
NIST CSF Identify evidence areas
Asset inventory
Reconcile endpoints, servers, network devices, cloud, SaaS, mobile, databases, and business systems.
Data and business context
Map sensitive data, regulated records, business processes, owners, dependencies, and recovery priorities.
Identity and access
Identify users, privileged accounts, service accounts, shared accounts, MFA coverage, and access ownership.
Vendor and third-party risk
Document critical vendors, data access, contracts, support contacts, renewal dates, and security expectations.
Vulnerabilities and exposure
Track vulnerabilities, unsupported systems, external exposure, patch gaps, weak configurations, and remediation owners.
Risk register
Maintain risks with business impact, owner, treatment plan, target date, evidence, and status.
Review matrix
Identify function evidence matrix
| Area | What to verify | Questions to answer | Evidence |
|---|---|---|---|
| Assets | Inventory endpoints, servers, network devices, cloud resources, SaaS, databases, and business systems. | What technology assets exist and who owns them? | Asset export, owner list, stale-device report, and reconciliation notes. |
| Data | Map sensitive data, regulated records, storage locations, data owners, access groups, and retention requirements. | Where is important data stored and who can access it? | Data map, access review, retention record, and data owner approval. |
| Dependencies | Document applications, sites, vendors, circuits, cloud services, backups, and recovery priorities. | What systems are required to keep the business running? | Dependency map, BIA notes, recovery priority list, and vendor contact sheet. |
| Identity | Review users, privileged accounts, service accounts, shared accounts, MFA, and access ownership. | Which accounts create the most risk? | Account export, privileged access review, MFA report, and exception list. |
| Vulnerabilities | Track vulnerability scan results, patch gaps, unsupported systems, external exposure, and weak configurations. | Which weaknesses need priority remediation? | Scan summary, patch report, external exposure list, and remediation tracker. |
| Risk register | Maintain risk statements, impact, likelihood, owner, treatment decision, due date, and status. | How are risks tracked and decided? | Risk register, treatment plan, acceptance notes, and review date. |
Step-by-step review
NIST CSF Identify evidence runbook
1
Collect source-of-truth records
Gather records from asset tools, RMM, EDR, Microsoft 365, cloud portals, network monitoring, firewalls, procurement, HR, and vendor files.
2
Reconcile assets and owners
Compare sources to find missing devices, stale records, unowned systems, shadow IT, unsupported assets, and critical systems.
3
Map data and dependencies
Document sensitive data, regulated data, business processes, application dependencies, vendors, sites, circuits, and recovery priorities.
4
Review identity exposure
Review privileged accounts, service accounts, shared accounts, MFA gaps, inactive users, and access owners.
5
Summarize vulnerabilities and exposure
Combine vulnerability scans, patch status, unsupported systems, firewall exposure, cloud exposure, and configuration risks.
6
Build the risk register
Create risk statements with business impact, likelihood, owner, treatment plan, target date, and current status.
7
Review evidence regularly
Refresh Identify evidence after major changes and on a monthly or quarterly cadence based on business risk.
Common risks
Common Identify evidence gaps
Asset inventory is incomplete
Security decisions are weaker when devices, SaaS applications, cloud resources, and unmanaged endpoints are missing.
Data owners are unknown
Sensitive data cannot be protected well if ownership, storage, access, and retention are unclear.
Vendors are not mapped
Critical vendors may have access to systems, data, backups, or support paths that affect business risk.
Dependencies are undocumented
Incident response and recovery are slower when application, network, cloud, and vendor dependencies are unknown.
Risks are not owned
Findings do not become action until each risk has an owner and treatment decision.
Evidence is stale
Identify evidence must be refreshed as systems, users, vendors, and business processes change.
Related support
Where IT Perfection can help
IT Perfection can help build asset inventory, endpoint management, cloud records, Microsoft 365 visibility, network documentation, patch evidence, and managed IT reporting.
OC Security Audit can help assess Identify function maturity, evidence quality, risk registers, vendor risk, vulnerability findings, and executive risk reporting.
Created by Ali Hassani, CISO
Professional Identify function evidence support
Ali Hassani brings 25+ years of hands-on experience across IT operations, cybersecurity, Microsoft infrastructure, network security, compliance readiness, cloud services, healthcare IT, MSP services, and business technology leadership.
This guide is for initial education and planning. It does not replace a professional cybersecurity audit, compliance assessment, penetration test, legal review, vendor engineering review, or Microsoft professional services engagement.
Identify evidence makes risk visible
A strong Identify program helps leadership understand what exists, what matters, who owns it, and which risks need priority action.
FAQ
NIST CSF Identify evidence FAQ
What is the first Identify evidence item to build?
Start with asset inventory and ownership, then expand into data, vendors, vulnerabilities, dependencies, identity, and risk register evidence.
How often should Identify evidence be updated?
Update after major changes and on a monthly or quarterly cadence depending on the pace of change and business risk.
What makes a risk register useful?
A useful risk register includes business impact, likelihood, owner, treatment decision, due date, status, and supporting evidence.
Why include vendor records?
Vendors can affect data access, uptime, support, backups, incident response, and compliance obligations, so they are part of business risk.
