CISSP EXAM PREP 2026–2027 COMPLETE
REVIEW WITH PRACTICE QUESTIONS &
EXPLANATIONS
ABOUT THIS GUIDE
The Certified Information Systems Security Professional (CISSP) is the most globally
recognized certification in the information security market. Administered by (ISC)², the
CISSP validates an information security professional's deep technical and managerial
knowledge to design, engineer, and manage an organization's overall security posture.
This Comprehensive Study Guide contains 210 exam-quality questions with detailed
rationales, organized according to the eight CISSP domains based on the official (ISC)²
CISSP Exam Outline (2024 revision, still current in 2026–2027).
2026–2027 Key Updates
The CISSP exam continues to evolve to reflect the changing cybersecurity landscape:
• AI Security Governance: New content on AI-specific risks including model
poisoning, adversarial attacks, data privacy, algorithmic bias, and EU AI Act
compliance requirements
• Zero Trust Architecture: Increased emphasis on zero trust principles, identity
verification mechanisms, micro-segmentation, and SASE
• Supply Chain Security: Software Bill of Materials (SBOM), third-party risk
management, and DevSecOps
• Cloud-Native Security: Container security, serverless security, and cloud security
control matrices
• China-Specific Regulations: Increased focus on China's Data Security Law and
Personal Information Protection Law
,Question 1
A security manager is conducting a quantitative risk analysis for a critical business
application. The asset value is $500,000, and the exposure factor for a potential
ransomware attack is estimated at 40%. What is the Single Loss Expectancy (SLE)?
A. $100,000
**B.** $200,000
C. $300,000
**D.** $400,000
Correct Answer: B
Rationale: SLE = Asset Value × Exposure Factor = $500,000 × 0.40 = $200,000. Option
A ($100,000) would be 20% of the asset value. **Option C** ($300,000) would be 60% of
the asset value. Option D ($400,000) would be 80% of the asset value.
Question 2
A security professional is evaluating risk response options for a newly identified
vulnerability. The organization decides to implement additional security controls to reduce
the likelihood of exploitation. Which risk response strategy is being employed?
A. Risk acceptance
B. Risk avoidance
C. Risk mitigation
D. Risk transfer
Correct Answer: C
Rationale: Risk mitigation involves implementing controls to reduce either the likelihood or
impact of a risk. Option A — Risk acceptance acknowledges the risk without taking
action. Option B — Risk avoidance eliminates the activity that creates the risk. Option D —
Risk transfer shifts the risk to a third party (e.g., insurance).
,Question 3
An organization discovers that a data breach has exposed customer PII. The security team
identifies the vulnerability, contains the incident, and notifies affected individuals. Which of
the following best describes the sequence of actions taken?
A. Identification, containment, eradication, recovery
B. Detection, analysis, containment, notification
C. Identification, analysis, containment, recovery
D. Detection, eradication, recovery, lessons learned
Correct Answer: B
Rationale: The correct incident response sequence is Detection → Analysis →
Containment → Eradication → Recovery → Lessons Learned. The scenario describes
detection (discovering the breach), analysis (identifying the vulnerability), containment, and
notification (which is part of the communication phase). Option A omits analysis. Option
C omits detection. Option D omits containment.
Question 4
A risk assessment identifies that a security control has been implemented but is not
functioning as intended. This scenario best describes which of the following?
A. A threat
B. A vulnerability
C. A risk
D. An exploit
Correct Answer: B
Rationale: A vulnerability is a weakness in a system or control that could be exploited. A
control that is not functioning as intended represents a vulnerability. Option A — A threat is
a potential cause of an unwanted incident. Option C — Risk is the combination of threat,
vulnerability, and impact. Option D — An exploit is an actual attack that takes advantage of
a vulnerability.
, Question 5
Which of the following is the FIRST canon of the (ISC)² Code of Ethics?
A. Protect society, the common good, necessary public trust and confidence, and the
infrastructure
B. Act honorably, honestly, justly, responsibly, and legally
C. Provide diligent and competent service to principals
D. Advance and protect the profession
Correct Answer: A
Rationale: The four canons of the (ISC)² Code of Ethics are: (1) Protect society, the
common good, necessary public trust and confidence, and the infrastructure; (2) Act
honorably, honestly, justly, responsibly, and legally; (3) Provide diligent and competent
service to principals; (4) Advance and protect the profession. The order of the canons
matters on the exam.
Question 6
An organization is developing a Business Continuity Plan (BCP). Which of the following
metrics represents the maximum allowable downtime for a critical business function?
A. RTO (Recovery Time Objective)
B. RPO (Recovery Point Objective)
C. MTD (Maximum Tolerable Downtime)
D. MTBF (Mean Time Between Failures)
Correct Answer: C
Rationale: MTD (Maximum Tolerable Downtime) is the maximum amount of time a
business function can be unavailable before causing unacceptable damage. Option A —
RTO is the targeted time to restore a function after a disruption. Option B — RPO is the
maximum acceptable data loss measured in time. Option D — MTBF is a reliability metric
for systems.
REVIEW WITH PRACTICE QUESTIONS &
EXPLANATIONS
ABOUT THIS GUIDE
The Certified Information Systems Security Professional (CISSP) is the most globally
recognized certification in the information security market. Administered by (ISC)², the
CISSP validates an information security professional's deep technical and managerial
knowledge to design, engineer, and manage an organization's overall security posture.
This Comprehensive Study Guide contains 210 exam-quality questions with detailed
rationales, organized according to the eight CISSP domains based on the official (ISC)²
CISSP Exam Outline (2024 revision, still current in 2026–2027).
2026–2027 Key Updates
The CISSP exam continues to evolve to reflect the changing cybersecurity landscape:
• AI Security Governance: New content on AI-specific risks including model
poisoning, adversarial attacks, data privacy, algorithmic bias, and EU AI Act
compliance requirements
• Zero Trust Architecture: Increased emphasis on zero trust principles, identity
verification mechanisms, micro-segmentation, and SASE
• Supply Chain Security: Software Bill of Materials (SBOM), third-party risk
management, and DevSecOps
• Cloud-Native Security: Container security, serverless security, and cloud security
control matrices
• China-Specific Regulations: Increased focus on China's Data Security Law and
Personal Information Protection Law
,Question 1
A security manager is conducting a quantitative risk analysis for a critical business
application. The asset value is $500,000, and the exposure factor for a potential
ransomware attack is estimated at 40%. What is the Single Loss Expectancy (SLE)?
A. $100,000
**B.** $200,000
C. $300,000
**D.** $400,000
Correct Answer: B
Rationale: SLE = Asset Value × Exposure Factor = $500,000 × 0.40 = $200,000. Option
A ($100,000) would be 20% of the asset value. **Option C** ($300,000) would be 60% of
the asset value. Option D ($400,000) would be 80% of the asset value.
Question 2
A security professional is evaluating risk response options for a newly identified
vulnerability. The organization decides to implement additional security controls to reduce
the likelihood of exploitation. Which risk response strategy is being employed?
A. Risk acceptance
B. Risk avoidance
C. Risk mitigation
D. Risk transfer
Correct Answer: C
Rationale: Risk mitigation involves implementing controls to reduce either the likelihood or
impact of a risk. Option A — Risk acceptance acknowledges the risk without taking
action. Option B — Risk avoidance eliminates the activity that creates the risk. Option D —
Risk transfer shifts the risk to a third party (e.g., insurance).
,Question 3
An organization discovers that a data breach has exposed customer PII. The security team
identifies the vulnerability, contains the incident, and notifies affected individuals. Which of
the following best describes the sequence of actions taken?
A. Identification, containment, eradication, recovery
B. Detection, analysis, containment, notification
C. Identification, analysis, containment, recovery
D. Detection, eradication, recovery, lessons learned
Correct Answer: B
Rationale: The correct incident response sequence is Detection → Analysis →
Containment → Eradication → Recovery → Lessons Learned. The scenario describes
detection (discovering the breach), analysis (identifying the vulnerability), containment, and
notification (which is part of the communication phase). Option A omits analysis. Option
C omits detection. Option D omits containment.
Question 4
A risk assessment identifies that a security control has been implemented but is not
functioning as intended. This scenario best describes which of the following?
A. A threat
B. A vulnerability
C. A risk
D. An exploit
Correct Answer: B
Rationale: A vulnerability is a weakness in a system or control that could be exploited. A
control that is not functioning as intended represents a vulnerability. Option A — A threat is
a potential cause of an unwanted incident. Option C — Risk is the combination of threat,
vulnerability, and impact. Option D — An exploit is an actual attack that takes advantage of
a vulnerability.
, Question 5
Which of the following is the FIRST canon of the (ISC)² Code of Ethics?
A. Protect society, the common good, necessary public trust and confidence, and the
infrastructure
B. Act honorably, honestly, justly, responsibly, and legally
C. Provide diligent and competent service to principals
D. Advance and protect the profession
Correct Answer: A
Rationale: The four canons of the (ISC)² Code of Ethics are: (1) Protect society, the
common good, necessary public trust and confidence, and the infrastructure; (2) Act
honorably, honestly, justly, responsibly, and legally; (3) Provide diligent and competent
service to principals; (4) Advance and protect the profession. The order of the canons
matters on the exam.
Question 6
An organization is developing a Business Continuity Plan (BCP). Which of the following
metrics represents the maximum allowable downtime for a critical business function?
A. RTO (Recovery Time Objective)
B. RPO (Recovery Point Objective)
C. MTD (Maximum Tolerable Downtime)
D. MTBF (Mean Time Between Failures)
Correct Answer: C
Rationale: MTD (Maximum Tolerable Downtime) is the maximum amount of time a
business function can be unavailable before causing unacceptable damage. Option A —
RTO is the targeted time to restore a function after a disruption. Option B — RPO is the
maximum acceptable data loss measured in time. Option D — MTBF is a reliability metric
for systems.
