- Version 24H2 / 25H2 26100.7171 KB5068861 → 24H2, 25H2
- Version 23H2 22631.6199 KB5068865 → 23H2
Release volume
19 fewer than October (53), vs 43/mo in 2025.
Security flaws fixed
-107 flaws compared to October (152).
Critical & urgent
4 critical in October, plus 3 out-of-band releases this month .
2025 Year-to-Date Trend
902 security flaws fixed across 476 updates in 2025
66 critical flaws and 23 exploited zero-days patched across the 11 published months of 2025.
- Version 21H2 / 22H2 19044.6575 KB5068781 → 21H2, 22H2
- Version 1809 17763.8027 KB5068791 → 1809
- Version 1607 14393.8594 KB5068864 → 1607
- Version 2025 26100.7171 KB5068861 → 2025
- Version 2022 20348.4405 KB5068787 → 2022
- Version 2019 17763.8027 KB5068791 → 2019
- Version 2016 14393.8594 KB5068864 → 2016
- Version CU21 + GDR 16.0.4222.2 KB5068406 → 2022
- Version GDR 16.0.1160.1 KB5068407 → 2022
- Version CU32 + GDR 15.0.4455.2 KB5068404 → 2019
- Version GDR 15.0.2155.2 KB5068405 → 2019
- Subscription Edition (SE) 16.0.19127.20338 KB5002800 → SE
- Version 2019 16.0.10417.20068 KB5002803 → 2019
- Version 2016 16.0.5526.1001 KB5002805 → 2016
- Office Online Server 16.0.10417.20068 KB5002801 → OOS
Vulnerabilities fixed, by version
All updates
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Windows 11 · 25H2Windows 11 Windows 11 Insider 25H2 Insider PreviewBeta ChannelBuild 26220.7271
Xbox full-screen gaming and smoother voice dictation
Adds Xbox full-screen gaming on more PCs, point-in-time restore, and smoother voice dictation, alongside fixes and known issues.
Package KB5070307Changes 3 new · 6 improved · 8 fixes -
Windows 11 · 23H2Windows 11 23H2 Windows 11 23H2 Optional previewPreview Final update for this version Final update for this versionKB5070312
File Explorer clicks and Chinese-named TAR extraction addressed
Addresses File Explorer mouse-click problems, TAR extraction failures with long Chinese names, and other issues. It is the final preview update for version 23H2; supported editions will receive only monthly security updates going forward.
Build 22631.6276Replaced by KB5071417 → -
Windows 11 · 24H2Windows 11 24H2 Windows 11 24H2 Out-of-band update Also for Windows ServerOut-of-bandKB5072359
24H2 moves to build 26100.7178
KB5072359 updates Windows 11, version 24H2 to build 26100.7178. It is listed as an out-of-band cumulative update.
Build 26100.7178 -
Windows 11 · 26H1Windows 11 Windows 11 Insider 26H1 Insider PreviewExperimental ChannelBuild 28000.1199
General improvements to the overall PC experience
Build 28000.1199 gives Canary Channel Insiders a small set of general improvements and fixes. The release notes do not name specific changes.
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Windows Server · 2025Windows Server 2025 Windows Server 2025 Out-of-band update Also for Windows 11Out-of-bandKB5072359
Prevents NVMe boot failures during Server 2025 upgrades
The out-of-band update prevents a boot failure during some upgrades from Windows Server 2022 to Windows Server 2025 on Intel C2030 systems with Samsung NVMe devices. It also improves the component that installs Windows updates.
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Windows 11 · 25H2Windows 11 Windows 11 Insider 25H2 Insider PreviewBeta ChannelBuild 26220.7262
HD Narrator voices and structured math reading
Build 26220.7262 for the Dev and Beta Channels gradually adds HD voices and math reading in Narrator, plus other accessibility and system changes. It also fixes several issues and has known problems on some devices.
Package KB5070303Changes 4 new · 9 improved · 5 fixes -
Windows 11 · 25H2Windows 11 Windows 11 Insider 25H2 Insider PreviewRelease Preview ChannelBuild 26200.7296
File Explorer dark mode and fixes for Settings and the taskbar
The Release Preview build adds File Explorer dark mode, Copilot+ PC features, and other Windows changes. It also addresses issues with Settings, the taskbar, graphics, and LSASS.
Changes 20 new · 8 improved · 12 fixes -
Windows 11 · 24H2Windows 11 Windows 11 Insider 24H2 Insider PreviewRelease Preview ChannelBuild 26100.7296
File Explorer dark mode and camera effects for more cameras
Brings gradual feature changes and fixes to Release Preview Insiders on Windows 11, version 24H2, including camera effects for more cameras on Copilot+ PCs and a more consistent File Explorer dark mode.
Changes 22 new · 6 improved · 15 fixes -
SQL Server · CU22SQL Server 2022 CU22 SQL Server 2022 CU22 Security update
Integration Services vulnerability fixed; parallel SESSION_CONTEXT issue remains
CU22 updates SQL Server 2022 to build 16.0.4225.2 with 20 fixes, including a fix for CVE-2022-26907 in Integration Services. Queries using SESSION_CONTEXT can still return incorrect results or trigger access violations in parallel plans.
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Windows 11 · 24H2, 25H2Windows 11 24H2 / 25H2 Windows 11 24H2 / 25H2 Security update Also for Windows ServerZero-dayKB5068861
Exploited Windows kernel flaw patched; handheld battery drain fixed
An actively exploited Windows kernel flaw is patched, along with fixes for handheld gaming battery drain and other problems. The password icon and WSL VPN issues remain listed as known issues.
Builds 26100.7171 26200.7171Security 34 CVEs 2 critical 1 exploitedKnown issues 2 openReplaced by KB5070311 → -
Windows 11 · 23H2Windows 11 23H2 Windows 11 23H2 Security updateZero-dayKB5068865
HTTP request parsing tightened; kernel flaw exploited
Fixes an HTTP.sys request-parsing issue and addresses 33 vulnerabilities, including an actively exploited Windows Kernel flaw. It also includes improvements to the servicing stack.
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Windows 10 · 21H2, 22H2Windows 10 21H2 / 22H2 Windows 10 21H2 / 22H2 Security updateZero-dayKB5068781
Closes exploited kernel flaw and fixes false support warning
Closes 33 vulnerabilities, including the actively exploited Windows Kernel flaw CVE-2025-62215, and fixes a false end-of-support warning. Secure Boot certificates begin expiring in June 2026; Microsoft recommends reviewing its guidance and updating certificates in advance.
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Windows 10 · 22H2Windows 10 22H2 Windows 10 22H2 Out-of-band updateOut-of-bandKB5071959
Consumer ESU enrollment failures addressed
The update addresses failures in the Windows 10 Consumer ESU enrollment wizard and includes the October 14, 2025 security fixes and improvements. Secure Boot certificates have started expiring in June 2026, so affected devices should be prepared in advance.
Build 19045.6466 -
Windows 10 · 1809Windows 10 1809 Windows 10 1809 Security update Also for Windows ServerZero-dayKB5068791
Exploited kernel flaw patched; unexpected UAC prompts addressed
Patches an actively exploited Windows kernel flaw and addresses unexpected User Account Control prompts in some apps, including Autodesk AutoCAD.
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Windows 10 · 1607Windows 10 1607 Windows 10 1607 Security update Also for Windows Server
Critical GDI+ flaw fixed; unexpected app prompts addressed
Fixes 25 security vulnerabilities, including the critical GDI+ remote-code execution flaw CVE-2025-60724. It also addresses unexpected UAC prompts for some apps, including Autodesk AutoCAD.
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Windows Server · 2025Windows Server 2025 Windows Server 2025 Security update Also for Windows 11Zero-dayKB5068861
Closes an exploited kernel flaw and adds post-quantum cryptography
Fixes 31 vulnerabilities, including an exploited Windows Kernel elevation-of-privilege flaw, and adds support for two post-quantum cryptography algorithms. WSUS still does not show synchronization error details.
Build 26100.7171Security 31 CVEs 2 critical 1 exploitedKnown issues 1 openReplaced by KB5072359 → -
Windows Server · 2022Windows Server 2022 Windows Server 2022 Security updateZero-dayKB5068787
Exploited Windows kernel flaw patched; unexpected UAC prompts addressed
The update fixes 30 vulnerabilities, including an actively exploited Windows kernel flaw, and addresses unexpected UAC prompts and HTTP request parsing behavior.
Build 20348.4405Security 30 CVEs 2 critical 1 exploitedKnown issues 1 openReplaced by KB5071547 → -
Windows Server · 2019Windows Server 2019 Windows Server 2019 Security update Also for Windows 10Zero-dayKB5068791
Exploited Windows kernel flaw addressed; unexpected UAC prompts fixed
The update addresses an actively exploited Windows kernel flaw and unexpected UAC prompts during some app repairs. It also includes security improvements and a servicing stack update.
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Windows Server · 2016Windows Server 2016 Windows Server 2016 Security update Also for Windows 10
Critical GDI+ flaw patched; unexpected UAC prompts addressed
Fixes 24 security vulnerabilities, including critical GDI+ remote code execution flaw CVE-2025-60724, and addresses unexpected UAC prompts for some apps, including Autodesk AutoCAD.
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SQL Server · CU21 + GDRSQL Server 2022 CU21 + GDR SQL Server 2022 CU21 + GDR Security update
Multi-role security filters corrected; backup procedure flaw mitigated
The update fixes one Important SQL Server elevation-of-privilege vulnerability, corrects a rare Row-Level Security issue, and mitigates SQL injection risk in an internal backup procedure.
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SQL Server · GDRSQL Server 2022 GDR SQL Server 2022 GDR Security update
RLS filtering enforced; backup procedure SQL injection mitigated
Fixes a rare Analysis Services security-filtering gap and mitigates a SQL injection vulnerability in an internal backup procedure.
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SQL Server · CU32 + GDRSQL Server 2019 CU32 + GDR SQL Server 2019 CU32 + GDR Security update
SQL injection access restricted; Analysis Services filters fixed
Addresses an SQL injection vulnerability in an internal backup procedure and fixes a rare configuration where Analysis Services security filters could be skipped.
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SQL Server · GDRSQL Server 2019 GDR SQL Server 2019 GDR Security update
Elevation-of-privilege flaw fixed; Analysis Services filters corrected
Fixes one Important SQL Server elevation-of-privilege vulnerability, corrects rare Analysis Services security-filter behavior, and reduces SQL injection risk in an exposed backup procedure.
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SQL Server · CU31 + GDRSQL Server 2017 CU31 + GDR SQL Server 2017 CU31 + GDR Security update
SQL injection protection for backup procedure; RLS filters fixed
The update reduces SQL injection risk in an exposed backup procedure and fixes cases where row-level security filters could be skipped in certain multi-role configurations.
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SQL Server · GDRSQL Server 2017 GDR SQL Server 2017 GDR Security update
Database privilege flaw patched; row filters no longer skipped
Addresses one Important SQL Server flaw and fixes a rare setup where database row filters could be skipped.