The Update Bureau
Monthly security update
- Version 26H1 28000.2269 KB5095051 → 26H1
- Version 24H2 / 25H2 26100.8655 KB5094126 → 24H2, 25H2
- Version 23H2 22631.7219 KB5093998 → 23H2
Release volume
42
updates released
21 fewer than May (63), vs 49/mo in 2026.
Security flaws fixed
234
vulnerabilities
+151 flaws compared to May (83).
Critical & urgent
34
critical · 2 zero-days
8 critical in May.
2026 Year-to-Date Trend
673 security flaws fixed across 292 updates in 2026
54 critical flaws and 9 exploited zero-days patched across the 6 published months of 2026.
Distinct security flaws fixed per month
Jan – Jun 2026
Monthly security update
- Version 21H2 / 22H2 19044.7417 KB5094127 → 21H2, 22H2
- Version 1809 17763.8880 KB5094123 → 1809
- Version 1607 14393.9234 KB5094122 → 1607
Monthly security update
- Version 2025 26100.32995 KB5094125 → 2025
- Version 2022 20348.5256 KB5094128 → 2022
- Version 2019 17763.8880 KB5094123 → 2019
- Version 2016 14393.9234 KB5094122 → 2016
Monthly security update
- Subscription Edition (SE) 16.0.19725.20384 KB5002873 → SE
- Version 2019 16.0.10417.20153 KB5002874 → 2019
- Version 2016 16.0.5556.1005 KB5002880 → 2016
Monthly security update
- Version RTM 15.2.2562.43 KB5094139 → SE
- Version CU15 · ESU only 15.2.1748.46 KB5094140 → 2019
- Version CU14 · ESU only 15.2.1544.41 KB5094142 → 2019
- Version CU23 · ESU only 15.1.2507.69 KB5094144 → 2016
Monthly security update
- No Patch Tuesday security update this month —
Monthly security update
- Office Online Server 16.0.10417.20137 KB5002875 → OOS
Vulnerabilities fixed, by version
All updates
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Windows 11 · Future platformsWindows 11 Windows 11 Insider Future platforms Insider PreviewExperimental ChannelBuild 29617.1000
Exact Magnifier zoom and a new screen tint setting
This Experimental Channel build adds precise Magnifier controls and screen tint, alongside changes to updates, audio, storage, and personalization. These are test features rolling out gradually.
Changes 5 new · 7 improved -
Windows 11 · 26H1Windows 11 Windows 11 Insider 26H1 Insider PreviewExperimental ChannelBuild 28120.2374
Mobile device controls and GIPHY-powered GIF browsing
Adds mobile device management settings, a remote recovery plug-in, and GIPHY GIF browsing for Experimental Channel Insiders. This test build may be unstable.
Changes 1 new · 2 improved -
Windows 11 · 26H1Windows 11 Windows 11 Insider 26H1 Insider PreviewBeta ChannelBuild 28020.2366
Mobile device controls and GIPHY-powered GIF browsing
Adds mobile-device controls in Settings, a recovery-management plug-in for device managers, and GIPHY GIF browsing in the emoji panel.
Changes 2 new · 2 improved -
Windows 11 · 26H2Windows 11 Windows 11 Insider 26H2 Insider PreviewExperimental ChannelBuild 26300.8758
Taskbar size controls and File Explorer fixes
Adds a dedicated taskbar size setting, refines taskbar transitions, improves File Explorer previews and details, and fixes two File Explorer issues.
Changes 1 new · 4 improved · 2 fixes -
Windows 11 · 25H2Windows 11 Windows 11 Insider 25H2 Insider PreviewBeta ChannelBuild 26220.8754
Remote sessions can disconnect when a smart card is removed
Beta Channel Insiders can test automatic disconnection of some remote sessions when a redirected smart card is removed, along with fixes for File Explorer and taskbar and sound improvements.
Changes 1 new · 2 improved · 1 fix -
Windows 11 · 26H1Windows 11 26H1 Windows 11 26H1 Optional previewPreviewKB5095091
Point-in-time recovery and NPU details arrive; Office launch issue remains
Adds point-in-time PC recovery and new Task Manager details for NPU use, alongside broad reliability improvements. Some third-party apps might still fail to open Office applications; a later update resolves the issue.
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Windows 11 · 24H2, 25H2Windows 11 24H2 / 25H2 Windows 11 24H2 / 25H2 Optional previewPreviewKB5095093
New recovery tools, accessibility controls, and Bluetooth changes
Adds recovery and update-pause features, expands accessibility and voice controls, and includes many reliability fixes. An Office-launch issue remains for some third-party apps; Microsoft says a later update resolves it.
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Windows 11 · Future platformsWindows 11 Windows 11 Insider Future platforms Insider PreviewExperimental ChannelBuild 29613.1000
Audio device controls and jack details in Settings
Adds audio device controls, playback meters, filters, and jack information for Windows Insiders receiving the gradual rollout.
Changes 5 improved -
Windows 11 · 26H1Windows 11 Windows 11 Insider 26H1 Insider PreviewExperimental ChannelBuild 28120.2315
Caption style updates and more reliable HD Audio
Improves caption style responsiveness and inbox HD Audio driver reliability.
Changes 3 improved -
Windows 11 · 26H1Windows 11 Windows 11 Insider 26H1 Insider PreviewBeta ChannelBuild 28020.2308
Inbox HD Audio driver reliability improves
Improves the reliability of the built-in HD Audio driver for Windows Insiders in the Beta Channel.
Changes 1 improved -
Windows 11 · 26H2Windows 11 Windows 11 Insider 26H2 Insider PreviewExperimental ChannelBuild 26300.8697
Dark-mode copy dialog and virtualization crash fixes
The Experimental Channel is testing a more consistent dark-mode copy dialog, a 26H2 version label, and fixes for taskbar clipping and virtualization crashes.
Changes 4 improved · 2 fixes -
Windows 11 · 25H2Windows 11 Windows 11 Insider 25H2 Insider PreviewBeta ChannelBuild 26220.8690
Virtualization crashes addressed and Start menu updates improved
Addresses a crash issue during restarts, virtual machine operations, and some games, and improves Start menu and Startup settings reliability.
Changes 2 improved · 1 fix -
SQL Server · CU6SQL Server 2025 CU6 SQL Server 2025 CU6 Cumulative update
Linked-server error 7416 and incorrect parallel SESSION_CONTEXT results
Linked-server queries using MSDASQL can fail with error 7416, and parallel queries using SESSION_CONTEXT can return incorrect results or create access-violation dumps. The update also includes 19 fixes and improvements.
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Windows 11 · Future platformsWindows 11 Windows 11 Insider Future platforms Insider PreviewExperimental ChannelBuild 29610.1000
Green-screen crash fix and faster storage navigation
This Experimental build gradually rolls out a fix for repeated green-screen crashes and faster storage navigation, along with fixes for Windows Security notifications and duplicate energy saver entries.
Changes 1 improved · 3 fixes -
Windows 11 · 26H1Windows 11 Windows 11 Insider 26H1 Insider PreviewExperimental ChannelBuild 28120.2302
Screen tint accessibility setting and faster app launches
Experimental Channel Insiders are testing a screen tint setting and faster app launches. Task Scheduler also keeps task-list column widths between sessions.
Changes 1 new · 2 improved -
Windows 11 · 26H1Windows 11 Windows 11 Insider 26H1 Insider PreviewBeta ChannelBuild 28020.2298
Screen tint and saved Task Scheduler column widths
The Beta (26H1) build adds Screen tint for adjusting display intensity and makes Task Scheduler remember column widths between sessions.
Changes 1 new · 1 improved -
Windows 11 · 26H1Windows 11 Windows 11 Insider 26H1 Insider PreviewRelease Preview ChannelBuild 28000.2333
Custom user-folder names and clearer NPU usage in Task Manager
Adds a custom user-folder name option during setup and more NPU details in Task Manager, alongside improvements to sign-in, search, USB, and other Windows features.
Changes 5 new · 26 improved -
Windows 11 · 26H2Windows 11 Windows 11 Insider 26H2 Insider PreviewExperimental ChannelBuild 26300.8687
Middle-click folder tabs and typo-tolerant app search
Adds middle-click folder tabs and more forgiving app search. Freezes when interacting with search, Notepad, or certain other scenarios should be resolved.
Changes 3 new · 9 improved · 6 fixes -
Windows 11 · 25H2Windows 11 Windows 11 Insider 25H2 Insider PreviewBeta ChannelBuild 26220.8680
Quieter Widgets and a new screen tint setting
Beta Channel build 26220.8680 tests quieter Widgets defaults, a screen tint accessibility setting, and more precise Magnifier zoom. It also includes File Explorer and Windows Update fixes.
Changes 4 new · 8 improved · 5 fixes -
Windows 11 · 25H2Windows 11 Windows 11 Insider 25H2 Insider PreviewRelease Preview ChannelBuild 26200.8728
Point-in-time restore and a quieter Widgets experience
Adds recovery, update-pause, Widgets, accessibility, and input options, alongside reliability changes across Windows 11.
Changes 6 new · 37 improved · 15 fixes -
Windows 11 · 24H2Windows 11 Windows 11 Insider 24H2 Insider PreviewRelease Preview ChannelBuild 26100.8728
Point-in-time recovery and quieter Widgets
Build 26100.8728 for the Release Preview Channel tests point-in-time recovery, a quieter Widgets experience, and many reliability changes for Windows 11 version 24H2.
Changes 7 new · 43 improved · 10 fixes -
Windows 11 · 26H1Windows 11 26H1 Windows 11 26H1 Security update
BitLocker testing improves; custom folder icons may disappear
Custom folder icons or localized names might be missing for files from downloaded or remote locations, though folder access is unchanged. The update also improves BitLocker Drive Encryption testing.
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Windows 11 · 24H2, 25H2Windows 11 24H2 / 25H2 Windows 11 24H2 / 25H2 Security update
Critical Remote Desktop flaws patched; Hyper-V crashes fixed
Critical Remote Desktop flaws get security fixes, and crashes after KB5089573 are addressed. Some folder icons may disappear in downloaded or remote locations.
Builds 26100.8655 26200.8655Security 107 CVEs 17 criticalKnown issues 1 openReplaced by KB5095093 → -
Windows 11 · 23H2Windows 11 23H2 Windows 11 23H2 Security update
Fixes 158 vulnerabilities (22 critical)
Critical code-execution flaws affect the Windows Kernel, DNS Client, Remote Desktop Client and other components. File Explorer search and Secure Boot also change.
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Windows 10 · 21H2, 22H2Windows 10 21H2 / 22H2 Windows 10 21H2 / 22H2 Security update
HTTP.sys remote-code flaw patched; Secure Boot reporting added
Patches a critical HTTP.sys remote-code execution flaw and adds Secure Boot status reporting. File Explorer search also handles Chinese text and UTF-8 files better.