notes / CISM

CISM

Planned

Certified Information Security Manager

My condensed notes across all four CISM domains, following the ISACA review manual. One long page — use the table of contents or Ctrl+F.

Exam 2027-03 · Updated 2026-05-30
I worked through the ISACA review manual domain by domain, condensed each into the rail notes below, and focused on the manager's lens — governance and risk over hands-on technique. These are personal study notes — verify anything exam-critical against official material. No exam content is reproduced here.
D1

Information security governance

17%  ·  Aligning the security program with business strategy through governance structures and clear accountability.


Governance fundamentals

  • Governance sets direction and oversight; management executes — the board owns risk appetite, the CISO runs the program.
  • A security strategy must trace to business objectives — every control answers to a business driver, not the reverse.
  • Governance value drivers — strategic alignment · risk management · value delivery · resource optimisation · performance measurement.

Roles and responsibilities

  • Define accountability with a RACI — board · steering committee · CISO · data owners · custodians · users.
  • The steering committee bridges business and security, prioritising investment against risk.

Frameworks and standards

  • Map the program to a recognised framework — ISO/IEC 27001 · NIST CSF · COBIT 2019.
  • Governance, risk, and compliance (GRC) tooling keeps policy, risk, and control evidence in one place.
D2

Information security risk management

20%  ·  Identifying, assessing, and treating information risk to a level the business accepts.


Risk concepts

  • Inherent versus residual risk; risk appetite (how much you’ll pursue) versus tolerance (how much you’ll bear).
  • Quantitative terms — SLE (single loss expectancy) · ARO (annual rate of occurrence) · ALE = SLE × ARO.

Risk assessment

  • Identify assets, threats, and vulnerabilities; assess likelihood and impact (qualitative or quantitative).
  • Keep a living risk register — owner · score · treatment · review date — not a one-off spreadsheet.

Risk treatment

  • Treat each risk explicitly — accept · avoid · transfer · mitigate — then monitor the residual.
  • Spend on controls in proportion to asset value and exposure; a control must cost less than the risk it removes.
D3

Information security program

33%  ·  Building and running the program — resources, controls, metrics, and assurance. The heaviest domain.


Program development

  • A program turns strategy into a roadmap — people · process · technology — with a defined operating model.
  • Align control objectives to the framework; baseline with standards such as NIST SP 800-53 and tailor to context.

Controls and operations

  • Layer administrative, technical, and physical controls; prefer preventive, detect what you cannot prevent.
  • Define an awareness program — phishing simulation · role-based training · measurable behaviour change.

Metrics and assurance

  • Measure with KPIs (performance) and KRIs (risk) that a business audience can read — not raw tool output.
  • Use independent assessment — internal audit · SOC 2 · penetration tests — to validate the program, not just self-attest.

Third-party and supply-chain risk

  • Assess vendors before onboarding and on a cycle; bake security terms, audit rights, and breach notification into contracts.
  • Track the residual risk a provider carries on your behalf — outsourcing the work never outsources the accountability.
D4

Incident management

30%  ·  Preparing for, detecting, responding to, and recovering from security incidents — and learning from them.


Incident response lifecycle

  • Prepare → detect and analyse → contain → eradicate → recover → post-incident review (NIST SP 800-61).
  • Define severity tiers and escalation up front; an incident is no time to invent the decision tree.

Preparation and detection

  • Stand up an incident response plan, a trained team (CSIRT), and tested playbooks before you need them.
  • Centralise detection — SIEM · continuous monitoring · threat intelligence — and tune for signal over noise.

Business continuity and recovery

  • Tie response to continuity metrics — RTO (downtime) · RPO (data loss) · MTD (maximum tolerable downtime).
  • Test the plan with tabletop and failover exercises; an untested plan is an assumption, not a capability.

Communication and lessons learned

  • Pre-agree who speaks to executives, customers, and regulators, and on what timeline — breach laws set hard clocks.
  • Close every incident with a blameless review that feeds concrete fixes back into the program.
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