Windows Server 2025: Security Update im Detail

What changed

Das Juli LCU enthält die aktuellen Security Fixes und die von Microsoft dokumentierten Quality Fixes für Windows Server 2025.

Technical details

• Security: August security fixes
• File Explorer: fixes DFS mapped-drive previews and copied files after reconnect
• Certificates: restores PQC choices during CA configuration and enables enrollment with new PQC templates
• Secure Boot: expanded high-confidence device targeting
• Emoji panel: adds GIPHY support
• Servicing stack: KB5120232 to build 26100.33288

Why it matters

Der Zielbuild ist die operative Grundlage für Patch Compliance, Pilot Rings, Wartungsfenster und Referenzimages.

Known limitations

• WSUS does not show synchronization error details after KB5070881 or later because Microsoft temporarily removed it for CVE-2025-59287
• Review the linked article for the current known-issue status

Now check

• Deploy KB5120233 to a Server 2025 pilot ring
• Test DFS mapped-drive access and PQC certificate enrollment
• Use WSUS and SUP logs for sync failures