Mitigation covers measures that reduce cybersecurity risk, limit damage from incidents, and help restore secure operations after an attack.
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Background for this topic.
Mitigation is the use of measures that reduce the likelihood or impact of a security threat. In information security, it commonly describes actions taken after a vulnerability, misconfiguration, or active attack is identified, as well as controls planned during system design. Mitigation may lower exposure without removing the underlying weakness; a software patch fixes a vulnerability, while disabling an affected feature or restricting access may provide temporary protection.
Effective mitigation connects vulnerability management with operational decisions: prioritize exposed, exploitable weaknesses on important assets; apply patches or configuration changes; and use compensating controls such as network segmentation, least-privilege access, multifactor authentication, or service isolation when a fix is unavailable. Threat intelligence can help assess exploitation urgency. Controls should be tested and monitored because they can fail or create new exposure. During an incident, containment actions—such as isolating a host or revoking credentials—are mitigations that limit spread while investigation and remediation proceed.
It's unclear why the NSA issued in-depth mitigation guidance for the software boot threat now, but orgs should take steps to harden their environments.
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