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Which of the following should be of GREATEST concern for an IS auditor when reviewing user account policies?
Correct Answer: A
Comprehensive and Detailed Step-by-Step Explanation: Failure torevoke access upon terminationposes the greatest security risk, as ex-employees could still access sensitive data or systems. * No Policy to Revoke Access (Correct Answer - A) * A terminated employee retaining access can lead todata breaches or insider threats. * Example:A former employee misuses active credentials to access financial systems. * Lack of Security Awareness Training (Incorrect - B) * Important but does not pose an immediate security risk like an active ex-employee account. * No NDAs (Incorrect - C) * Protects intellectual property but is not as critical as system access. * No Access Revocation for Role Changes (Incorrect - D) * Still a concern, but ex-employees with active access are ahigherrisk. References: * ISACA CISA Review Manual * NIST 800-53 (Access Control)