Quick Answer
The correct answer is vulnerability. The absence of encryption at rest in a payment processing system is a weakness or flaw in the asset—such as a database or storage volume—that can be exploited by a threat, making it a classic vulnerability rather than the threat or the resulting risk. In risk identification, you must distinguish between the security gap (vulnerability), the potential cause of harm (threat), and the business impact (risk). On the Certified in Risk and Information Systems Control CRISC exam, this distinction is frequently tested to ensure you can correctly classify findings during the risk identification phase. A common trap is confusing a vulnerability with a risk: remember, a vulnerability is the condition (like missing AES-256 encryption), while risk is the likelihood and impact of that condition being exploited. Memory tip: “Vulnerability is the unlocked door; risk is the chance someone walks through it.”
This CRISC practice question tests your understanding of it risk identification. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company is conducting a Risk Identification for a new payment processing system. The team discovers that the system does not have encryption at rest. This is an example of:
Control
Why wrong: Encryption would be a control; its absence is a vulnerability.
Threat
Why wrong: A threat is a potential cause; the absence of encryption is a weakness.
Vulnerability
Lack of encryption at rest is a weakness or gap in controls.
Risk
Why wrong: Risk is the combination of vulnerability, threat, and impact.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Vulnerability
The absence of encryption at rest in a payment processing system is a weakness or flaw that can be exploited, making it a vulnerability. In risk identification, a vulnerability is a condition or weakness in an asset (e.g., database, storage volume) that, if exploited by a threat, could lead to a risk event. Here, the missing encryption at rest (e.g., AES-256 for stored cardholder data) is a specific security gap, not the threat itself or the resulting risk.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Control
Why it's wrong here
Encryption would be a control; its absence is a vulnerability.
Threat
Why it's wrong here
A threat is a potential cause; the absence of encryption is a weakness.
Vulnerability
Why this is correct
Lack of encryption at rest is a weakness or gap in controls.
Related concept
Read the scenario before looking for a memorised answer.
Risk
Why it's wrong here
Risk is the combination of vulnerability, threat, and impact.
Common exam traps
The trap here is confusing a vulnerability (the missing encryption) with the risk (the potential for data exposure) or the threat (the attacker who might exploit it), leading candidates to pick 'Risk' or 'Threat' instead of the correct 'Vulnerability'.
Detailed technical explanation
Encryption at rest typically uses symmetric algorithms like AES-256 with key management via standards such as PKCS#11 or cloud provider KMS. In payment systems, PCI DSS Requirement 3.4 mandates rendering stored PAN unreadable, often via encryption or tokenization. A real-world scenario: if a database storing credit card numbers lacks TDE (Transparent Data Encryption) or file-level encryption, an attacker who compromises the OS can read the raw data files, directly violating compliance and security.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the CRISC exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
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FAQ
IT Risk Identification — This question tests IT Risk Identification — Read the scenario before looking for a memorised answer..
The correct answer is: Vulnerability — The absence of encryption at rest in a payment processing system is a weakness or flaw that can be exploited, making it a vulnerability. In risk identification, a vulnerability is a condition or weakness in an asset (e.g., database, storage volume) that, if exploited by a threat, could lead to a risk event. Here, the missing encryption at rest (e.g., AES-256 for stored cardholder data) is a specific security gap, not the threat itself or the resulting risk.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 2026
This CRISC practice question is part of Courseiva's free ISACA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CRISC exam.
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