Windows Server · 2025 · Release · Security update (Patch Tuesday)

Windows Server 2025 (26100.33650)

Windows Server 2025: LTSC mainstream support through 2029-11-13

Microsoft release information · Verified Oct 13, 2026

Download amd64 — build 26100.33650 from UUP Dump, opens in a new tab All 2025 builds JSON — this build from the builds API

AI summary

Windows Server 2025 (build 26100.33650) is identified as a Release build for version 2025. I couldn’t verify build-specific changes, so I can’t reliably summarize any beyond that identity.

Generated from the package's release notes and forum coverage. Verify against Microsoft's release-health page before acting on it.

Microsoft's known issues — KB5126646

  • Issue Known issue After installing KB5070881 or later updates, Windows Server Update Services (WSUS) does not display synchronization error details within its error reporting. This functionality is temporarily removed to address the Remote Code Execution Vulnerability, CVE-2025-59287 .

Microsoft's release notes for KB5126646 ›

Known issues — reported on the forum

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