01Practice
Cybersecurity risk assessment services: a risk register leadership can act on
An independent assessment of cyber risk across your organization or a defined scope: what you run, who would target it, which controls operate and where the gaps leave real exposure. The result is a rated risk register, treatment plans with owners and effort, and a method your team can repeat, aligned to ISO/IEC 27005 and NIST SP 800-30.
- Name
- Cybersecurity Risk Assessment
- Line
- 01 · Cybersecurity
- Type
- Practice, engaged on its own or within a program
01The problem
Most risk registers describe fears, not evidence.
Risk assessments are often produced to satisfy a framework clause or a board request. The register that results lists generic threats, rates them by feel and is not revisited until the next audit. It does not say which systems matter most, which controls have been tested, or what it would take to reduce a specific risk.
A useful assessment is anchored in evidence: an asset inventory, the findings of recent testing, the state of controls as they actually operate, and threat intelligence relevant to your sector. It gives leadership a short list of decisions, each with an effort and a consequence.
- Decisions, not scores
- Each risk ends in a treatment option with an owner, an estimated effort and the residual risk that remains, so the register is something a leadership team can decide on.
- Evidence over interviews
- Interviews establish context. Configuration reviews, test results, log coverage and identity data establish whether controls work. The assessment uses both and says which is which.
- A method you keep
- The scales, criteria and templates are handed over and documented, so the next assessment can be run by your team and compared with this one.
02Scope
What cybersecurity risk assessment covers.
Enterprise cyber risk assessment
Organization-wide assessment of assets, threats, vulnerabilities and controls, producing a prioritized register and a treatment roadmap.
Scoped and system risk assessment
Assessment of one platform, product, business unit or cloud estate, for example before a launch, an acquisition or a regulatory submission.
Control effectiveness review
Testing whether the controls that are documented actually operate, using configuration evidence, sampling and the output of penetration tests.
Threat and attack-path analysis
Sector-relevant threat actors and techniques mapped to your environment, with the paths that lead from exposure to critical systems and data.
Risk quantification support
Where a financial view is wanted, loss scenarios estimated with a defined method such as FAIR, with the assumptions written down.
Framework-aligned assessment
Assessments structured to the risk requirements of ISO/IEC 27001, NIST CSF, SEBI CSCRF, the RBI framework or the standard your regulator or customer names.
Board and leadership reporting
A short report in business terms: the top risks, the decisions requested, and how the position has changed since the last assessment.
03Approach
How a cybersecurity risk assessment engagement runs.
ISO/IEC 27005 and NIST SP 800-30 for method, MITRE ATT&CK for threat mapping, and FAIR where quantification is requested. Findings from [penetration testing](/services/cybersecurity/penetration-testing) and [vulnerability management](/services/cybersecurity/vulnerability-management) feed the control assessment, and treatment plans can be carried out by Onion [security architecture](/services/cybersecurity/security-architecture) and engineering teams.
Establish context and criteria
Agree scope, business impact criteria, likelihood scales and risk appetite with leadership, so that ratings mean the same thing to everyone.
Identify assets and threats
Inventory the systems, data and dependencies in scope. Map the threat actors and techniques relevant to your sector and technology.
Assess controls and vulnerabilities
Review controls as they operate, using configuration evidence, log coverage, identity data and the results of recent testing. Commission tests where evidence is missing.
Analyze and evaluate
Rate each risk against the agreed criteria, trace the attack paths behind the highest ones, and compare with risk appetite.
Treat and report
Treatment options with owner, effort and residual risk for each significant risk. Reports for leadership and for the teams that will do the work.
04Deliverables
Cybersecurity risk assessment deliverables.
- Agreed risk criteria, scales and appetite statement
- Asset and dependency inventory for the scope assessed
- A rated risk register with the evidence behind each rating
- Attack-path analysis for the highest risks
- Treatment plans with owners, effort and residual risk
- A leadership report and a repeatable method documented for your team
When this work fits
- Organizations that need a risk assessment for ISO 27001, SEBI CSCRF, the RBI framework or a customer requirement
- Boards and leadership teams asking for a clear view of cyber risk before approving budget
- Companies preparing for an acquisition, a launch or a move to the cloud
- Security leaders who want an independent view to compare with their own
05Questions
Cybersecurity risk assessment: questions we are asked
A penetration test shows what an attacker can reach in a defined scope. An audit checks controls against a standard. A risk assessment uses both as evidence and adds business impact and likelihood, so leadership can decide where to spend. Each answers a different question, and this page covers the third.
A scoped assessment of one platform or business unit is usually measured in weeks. An enterprise assessment depends on the number of systems, the evidence already available and the time control owners can give. The scoping conversation produces a dated plan.
The method is aligned to ISO/IEC 27005, which is what ISO 27001 auditors expect, and the register is structured so it can be presented against the risk requirements of SEBI CSCRF, the RBI cyber security framework and NIST CSF. The specific regulator’s format is confirmed at scoping.
When it is wanted. Quantification with a defined method such as FAIR is useful for comparing treatment options and for insurance conversations. The assumptions are written down and the ranges are honest. Where the data to support it does not exist, we say so and use the qualitative scales instead.
Often alongside
Related services, industries and guides
Working with us
What every engagement rests on.
- Non-disclosure agreements
- Every engagement is governed by an NDA. Details of your environment, findings and deliverables stay within the engagement.
- Least-privilege access
- The minimum access the work requires, tied to named individuals and removed when the work ends.
- Telemetry stays in your tenant
- In security operations, our analysts work inside your SIEM, EDR or cloud console in preference to exporting logs to systems we run.
- End of engagement
- Access is handed back, and your information is returned or deleted as agreed with you.
Onion Information Security Solutions Private Limited · CIN U62099MH2025PTC443498 · Registered office in Mumbai, India