As the lead cybersecurity analyst for XYZ Corp, you are developing a report for management on the current security posture of the organization. In the context of vulnerability management, which metric would be most appropriate to include in your report to demonstrate the organization's improvement in identifying and mitigating vulnerabilities over time?
Mean time to remediate (MTTR) is a key performance indicator that measures the average time taken to fix a vulnerability after it has been detected. This metric highlights how quickly the organization can move from discovery to mitigation; a downward trend over successive reporting periods therefore signals improved efficiency in both identifying and addressing vulnerabilities. Mean time between failures (MTBF) is a reliability metric used for hardware and does not reflect how fast security teams close vulnerabilities. Time to first acknowledgement measures only the initial response and omits the complete mitigation phase. Simply counting the number of patches applied fails to convey the speed or effectiveness of the remediation process and can be skewed by patch bundling or differing vulnerability counts.
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Why is MTTR important in vulnerability management?