I executed the security update to remediate high-severity vulnerabilities identified by our IDS telemetry and vendor advisories, including a zero-day privilege escalation pathway and two potential remote code execution vectors. The patch set was validated in a mirrored staging environment with integration tests across critical research workloads, and all package signatures and SBOM checks passed. I scheduled a rolling deployment during the pre-approved maintenance window using canary nodes, live health probes, and a documented rollback plan to maintain SLOs and minimize disruption. I also preserved full auditability and policy alignment by recording cryptographic hashes, change tickets, and access-boundary confirmations to respect stakeholder governance and my operational autonomy.