Incident Response Checklist 🚨 Immediate Actions (0-24 hours) Apply the out-of-band security update for CVE-2025-59287 on all affected Windows Server versions. Isolate any WSUS servers that are publicly exposed to the internet. Block external access to WSUS endpoints on ports 8530/8531 at the network perimeter. Notify all relevant stakeholders about the critical vulnerability and active exploitation. 🔄 Recovery Actions Reboot WSUS servers after applying the security update to ensure the patch is effective. Restore any compromised systems from clean backups if necessary. Validate the integrity of WSUS configurations and ensure no unauthorized changes were made. Re-enable WSUS services once systems are confirmed secure and patched.
