When discussing cybersecurity performance and resilience, most organizations first think about prevention: firewalls, patching cadence, penetration testing, vulnerability counts, and control coverage. These are necessary defenses, but like all defenses, they will eventually be tested. As discussed in the previous post on Mean Time to Respond (MTTR), how quickly an organization recovers after an incident is a critical indicator of security maturity. But there is a metric that sits squarely between detection and recovery that often gets overlooked, despite having a direct impact on risk and business impact: Mean Time to Contain (MTTC). What Is Mean Time to Contain (MTTC)? Mean Time to Contain (MTTC) measures the average amount of time it takes to stop an active security incident after it has been detected. Containment is not remediation. It is the act of preventing further damage while the incident is still in progress. Typical containment activities include: Isolating affected en...
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