Critical

Critical

CVSS 9.0–10.0. In Rietta’s practice, a Critical-tier vulnerability is treated as an emergency: patch immediately, out of cycle, especially if the CVE is listed in CISA’s Known Exploited Vulnerabilities catalog. Federal civilian agencies are held to specific, often short remediation deadlines for KEV-listed vulnerabilities under CISA’s Binding Operational Directive 22-01; private-sector organizations aren’t bound by that directive, but treating it as the floor, not the ceiling, is good practice.