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KB5026361: May 2023 monthly security update for Windows 10, version 22H2, Windows 10 Enterprise LTSC 2021 (version 21H2) and Windows 10, version 20H2

Windows Build Decoder: What a Windows build number means: 10.0.26100.2314 is Windows 11 24H2 with the November 2024 update. Version, KB, support dates, updates behind.

Paste a Windows build number from winver, ver, a system inventory or a vulnerability scan: 10.0.26100.2314, 19045.5487, Microsoft Windows [Version 10.0.22631.4460], a KB number or a version like 22H2. You get the Windows version (the same build is often a client and a server release), the cumulative update it has, how many monthly security updates behind it is, and how long that version gets updates. Versions, updates and dates come from Microsoft's release information for Windows 11, Windows 10 and Windows Server, read 2026-10-29.

Try: 10.0.26100.2314, 19045.5487, 22631.4460, 20348, 17763, KB5046617, 22H2

KB5026361 is the May 2023 monthly security update, released 2023-05-09 (download). Installing it brings Windows to these builds:

BuildWindows versionReleasedNewer updates
19045.2965 Windows 10, version 22H2 2023-05-09 41 monthly security updates since; latest 19045.7811 (KB5134125)
19044.2965 Windows 10 Enterprise LTSC 2021 (version 21H2) / Windows 10, version 21H2 2023-05-09 41 monthly security updates since; latest 19044.7811 (KB5134125)
19042.2965 Windows 10, version 20H2 2023-05-09 None: the latest as of 2026-10-29

Cumulative updates include everything before them, so the latest update for a version replaces this one.