A key risk indicator (KRI) is a metric that measures the changes in the level of risk exposure, such as by monitoring the risk drivers, triggers, or events. A KRI indicates a reduction in the percentage of appropriately patched servers means that the enterprise is not applying the latest security updates or fixes to its servers, which could expose them to vulnerabilities or threats. The best course of action for the risk practitioner when a KRI indicates a reduction in the percentage of appropriately patched servers is to determine changes in the risk level. The risk level is the measure of the impact and likelihood of the risk, and it should be consistent and comparable across the enterprise and over time. By determining changes in the risklevel, the risk practitioner can assess the current or emerging risks, and decide on the appropriate risk response strategy and actions. The other options are not the best course of action, as they involve different aspects or outcomes of the risk management process:

Outsource the vulnerability management process means that the enterprise transfers the responsibility or burden of identifying, analyzing, prioritizing, and remediating the vulnerabilities in the IT systems and applications to a third party, such as a vendor or a contractor. This may not be a feasible or effective way to address the risk of unpatched servers, as it may not reduce the exposure or impact of the risk, or may introduce new risks, such as contractual disputes, quality issues, or intellectual property rights.

Review the patch management process means that the enterprise evaluates the existing procedures and practices for applying the security updates or fixes to the servers, and identifies the gaps or weaknesses that need to be addressed. This may be a useful step in the risk management process, but it is not the best course of action, as it may not provide immediate or sufficient information or action to address the risk of unpatched servers, or may not account for the uncertainties or complexities of the risk.

Add agenda item to the next risk committee meeting means that the enterprise communicates the risk of unpatched servers to the senior executives who oversee the enterprise-wide risk management program, and provide guidance and direction to the risk owners and practitioners. This may be a helpful step in the risk management process, but it is not the best course of action, as it may not provide timely or adequate information or action to address the risk of unpatched servers, or may not reflect the urgency or priority of the risk. References = Risk and Information Systems Control Study Manual, 7th Edition, Chapter 4, Section 4.3.2.1, pp. 171-172.