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The Update Bureau

Monthly Patch Briefing

March 2026

49 updates released this month across 6 product lines · 24 Patch Tuesday · 3 out-of-band · 2 previews .

Release volume

49 updates released

12 more than February (37), vs 42/mo in 2026.

Mar 2026
49
Feb 2026
37
2026 average
42/mo

Security flaws fixed

57 vulnerabilities

+18 flaws compared to February (39).

Mar 2026
57
Feb 2026
39
2026 average
68/mo

Critical & urgent

1 critical

1 critical in February, plus 3 out-of-band releases this month .

Mar critical
1
Feb critical
1
2026 average
2/mo

2026 Year-to-Date Trend

205 security flaws fixed across 127 updates in 2026

7 critical flaws and 6 exploited zero-days patched across the 3 published months of 2026.

Distinct security flaws fixed per month Jan – Mar 2026
March 2026

Vulnerabilities fixed, by version

Product Version Monthly update & build Critical Important Total
Windows 11
Windows 11, version 26H1 KB5079466 28000.1719 · 40 40
Windows 11
Windows 11, version 25H2 KB5079473 26200.8037 · 41 41
Windows 11
Windows 11, version 24H2 KB5079473 26100.8037 · 41 41
Windows 11
Windows 11, version 23H2 KB5078883 22631.6783 · 41 41
Windows 10
Windows 10 Enterprise LTSC 2019 KB5078752 17763.8511 · 40 40
Windows 10
Windows 10 Enterprise LTSB 2016 KB5078938 14393.8957 · 35 35
Windows 10
Windows 10, version 22H2 KB5078885 19045.7058 · 43 43
Windows 10
Windows 10 Enterprise LTSC 2021 KB5078885 19044.7058 · 43 43
Windows Server
Windows Server 2025 KB5078740 26100.32522 · 39 39
Windows Server
Windows Server 2022 KB5078766 20348.4893 · 40 40
Windows Server
Windows Server 2019 KB5078752 17763.8511 · 38 38
Windows Server
Windows Server 2016 KB5078938 14393.8957 · 34 34
SQL Server
SQL Server 2025 KB5077466 17.0.4020.2 · 3 3
SQL Server
SQL Server 2022 KB5077464 16.0.4240.4 · 2 2
SQL Server
SQL Server 2019 KB5077469 15.0.4460.4 · 2 2
SQL Server
SQL Server 2017 KB5077471 14.0.3520.4 · 2 2
SQL Server
SQL Server 2016 KB5077473 13.0.7075.5 · 2 2
SharePoint Server
SharePoint Server Subscription Edition KB5002843 16.0.19725.20076 1 2 3
SharePoint Server
SharePoint Server 2019 KB5002845 16.0.10417.20102 1 3 4
SharePoint Server
SharePoint Server 2016 KB5002850 16.0.5543.1000 1 3 4
Office Online Server
Office Online Server KB5002846 16.0.10417.20102 · 4 4

All updates

All updates:
  • Windows 11 · 24H2, 25H2
    Windows 11 24H2 / 25H2 Windows 11 24H2 / 25H2 Out-of-band update
    Out-of-band
    KB5086672

    Setup error 0x80073712 fixed for March preview installs

    Fixes error 0x80073712 that stopped some Windows 11 24H2 and 25H2 devices from installing the March preview update. It also carries forward quality improvements from earlier releases.

    Builds 26100.8117 26200.8117
    Replaced by KB5083769 →
  • Windows 11 · Future platforms
    Windows 11 Windows 11 Insider Future platforms Insider Preview
    Experimental Channel
    Build 29558.1000

    Console image support and Azure Virtual Desktop authentication fix

    Adds image display and other updates to Windows Console, and fixes an Azure Virtual Desktop connection error. Some changes are rolling out gradually.

    Changes 4 new · 9 improved · 5 fixes
  • Windows 11 · 26H1
    Windows 11 Windows 11 Insider 26H1 Insider Preview
    Experimental Channel
    Build 28020.1797

    General experience improvements for Canary Insiders

    Brings a small set of general improvements and fixes to the Canary Channel, rolling out gradually to Insiders with the latest-updates toggle on.

  • Windows 11 · 26H2
    Windows 11 Windows 11 Insider 26H2 Insider Preview
    Experimental Channel
    Build 26300.8142

    Touchpad right-click sizing and new Task Manager NPU columns

    Adds touchpad right-click sizing, more Task Manager resource details, and a printer-mode icon. It also fixes a Braille issue.

    Package KB5079492
    Changes 4 new · 3 improved · 1 fix
  • Windows 11 · 25H2
    Windows 11 Windows 11 Insider 25H2 Insider Preview
    Beta Channel
    Build 26220.8138

    Touchpad right-click sizing and Task Manager NPU details

    Beta Channel Insiders are testing a touchpad right-click size setting, Task Manager NPU details, and a Settings option for Administrator Protection. The build also addresses Braille and display-language issues.

    Package KB5079491
    Changes 2 new · 2 improved · 2 fixes
  • Windows 11 · 26H1
    Windows 11 26H1 Windows 11 26H1 Optional preview
    Preview
    KB5079489

    New taskbar network test, emoji, and recovery features arrive

    Adds features such as a taskbar network speed test, new emojis, and expanded recovery options, alongside reliability and performance improvements. It may require a restart.

    Build 28000.1764
    Replaced by KB5083768 →
  • Windows 11 · 24H2, 25H2
    Windows 11 24H2 / 25H2 Windows 11 24H2 / 25H2 Optional preview
    Preview
    KB5079391

    Installation error pauses rollout; Narrator adds Copilot descriptions

    Adds Narrator image descriptions through Copilot and other Windows changes, but Microsoft has stopped offering it to new devices after some installations failed. KB5086672 includes these changes and fixes the installation problem.

    Builds 26100.8116 26200.8116
    Replaced by KB5086672 →
  • Windows 11 · 24H2, 25H2
    Windows 11 24H2 / 25H2 Windows 11 24H2 / 25H2 Out-of-band update
    Out-of-band
    KB5085516

    Microsoft account sign-ins recover from false “no Internet” errors

    Fixes sign-in failures for Microsoft account users after the March 10 update. Devices enrolled in Hotpatch receive the fix through KB5085518 without a restart.

    Builds 26100.8039 26200.8039
    Replaced by KB5079391 →
  • Windows 11 · Future platforms
    Windows 11 Windows 11 Insider Future platforms Insider Preview
    Experimental Channel
    Build 29553.1000

    Feedback Hub gets a simpler form and better screenshot tools

    Brings platform changes to the Canary Channel and a redesigned Feedback Hub app to Canary and Dev Insiders, with simpler feedback submission and improved screenshot tools.

    Changes 4 new · 4 improved
  • Windows 11 · 26H1
    Windows 11 Windows 11 Insider 26H1 Insider Preview
    Experimental Channel
    Build 28020.1743

    Per-listener audio controls and a redesigned Feedback Hub

    Canary Channel Insiders get changes to shared audio, File Explorer, and the context menu, plus a redesigned Feedback Hub. The Feedback Hub app update is also available to Dev Channel Insiders.

    Changes 5 new · 7 improved
  • Windows 11 · 26H2
    Windows 11 Windows 11 Insider 26H2 Insider Preview
    Experimental Channel
    Build 26300.8085

    Pointer indicator returns and Feedback Hub gets a new design

    Build 26300.8085 for the Dev Channel resumes the Pointer indicator rollout, lets Magnifier show protected content, and introduces a redesigned Feedback Hub app.

    Package KB5079483
    Changes 5 new · 6 improved · 1 fix
  • Windows 11 · 25H2
    Windows 11 Windows 11 Insider 25H2 Insider Preview
    Beta Channel
    Build 26220.8079

    Input flyout and voice typing reliability, plus Wi-Fi display fix

    Improves input flyout and voice typing reliability, and corrects a Network and Sharing Center display error. These changes are gradually rolling out to Insiders with the latest-updates toggle on.

    Package KB5079482
    Changes 2 improved · 1 fix
  • Windows 11 · Future platforms
    Windows 11 Windows 11 Insider Future platforms Insider Preview
    Experimental Channel
    Build 29550.1000

    Emoji panel additions and camera pan-and-tilt controls

    Adds Emoji 16.0 emojis, camera pan-and-tilt controls, and voice typing for renaming files, alongside reliability and power-setting changes.

    Changes 3 new · 8 improved
  • Windows 11 · 26H1
    Windows 11 Windows 11 Insider 26H1 Insider Preview
    Canary Channel
    Build 28020.1738

    Canary servicing test requires a restart but adds no features

    This Canary update tests the servicing process without adding features or changing the displayed build version. A restart is required.

    Package KB5084491
  • Windows 11 · 26H1
    Windows 11 Windows 11 Insider 26H1 Insider Preview
    Experimental Channel
    Build 28020.1737

    Pen settings add a Copilot key option for the pen tail button

    The Canary Channel build refines Pen settings and adds an option for the pen tail button to launch the same app as the Copilot key. The changes are rolling out gradually to Insiders with the toggle on.

    Changes 1 new
  • Windows 11 · 26H2
    Windows 11 Windows 11 Insider 26H2 Insider Preview
    Experimental Channel
    Build 26300.8068

    Custom user-folder names and stricter driver trust checks

    Dev Channel Insiders get a setup option for choosing a user-folder name and a new driver trust policy. The build also updates app removal, recovery, account, and input settings.

    Package KB5079464
    Changes 4 new · 7 improved · 2 fixes
  • Windows 11 · 25H2
    Windows 11 Windows 11 Insider 25H2 Insider Preview
    Beta Channel
    Build 26220.8062

    Custom user-folder names and stricter driver trust checks

    Beta Channel Insiders are testing custom user-folder names during setup and a new default trust policy for drivers, along with app-removal policy and recovery updates.

    Package KB5079458
    Changes 3 new · 6 improved · 1 fix
  • Windows 11 · 24H2
    Windows 11 Windows 11 Insider 24H2 Insider Preview
    Release Preview Channel
    Build 26100.8106

    Narrator image descriptions and Smart App Control settings

    Release Preview Insiders on Windows 11 24H2 and 25H2 get Narrator image descriptions with Copilot, except in the European Economic Area, plus a way to turn Smart App Control on or off without a clean install.

    Package KB5079387
    Changes 10 new · 16 improved · 1 fix
  • SQL Server · CU3
    SQL Server 2025 CU3 SQL Server 2025 CU3 Cumulative update
    KB5077896

    SqlLocalDB crashes fixed; bulk import gains delegated permissions

    Fixes SQL Server issues including SqlLocalDB crashes and adds support for bulk data imports without requiring sysadmin access. Queries using SESSION_CONTEXT might return incorrect results in parallel plans.

    Build 17.0.4025.3
    Known issues 1 open
    Replaced by KB5083245 →
  • SQL Server · CU24
    SQL Server 2022 CU24 SQL Server 2022 CU24 Cumulative update
    KB5080999

    Parallel SESSION_CONTEXT errors and listener warnings remain open

    CU24 fixes 14 SQL Server 2022 issues, but parallel SESSION_CONTEXT queries can return wrong results or cause access violations. Availability group listeners might also generate error-log messages.

    Build 16.0.4245.2
    Known issues 3 open
    Replaced by KB5083252 →
  • Windows 11 · 26H1
    Windows 11 26H1 Windows 11 26H1 Security update
    KB5079466

    Secure Boot certificate rollout expands; COM allowlisting works as expected

    The update expands the phased delivery of new Secure Boot certificates and improves COM allowlisting in Windows Defender Application Control. It also includes 40 Important-severity security fixes.

    Build 28000.1719
    Security 40 CVEs
    Replaced by KB5079489 →
  • Windows 11 · 24H2, 25H2
    Windows 11 24H2 / 25H2 Windows 11 24H2 / 25H2 Security update
    KB5079473

    Secure Boot certificate rollout expands; app sign-in can fail

    Secure Boot certificate coverage expands, while Microsoft-account sign-in can fail in some apps after installation. File Explorer search and WDAC policy handling also improve.

    Builds 26100.8037 26200.8037
    Security 41 CVEs
    Known issues 1 open
    Replaced by KB5085516 →
  • Windows 11 · 23H2
    Windows 11 23H2 Windows 11 23H2 Security update
    KB5078883

    Secure Boot coverage expands; File History handles more filenames

    The update addresses 41 Important-severity vulnerabilities and broadens the rollout of new Secure Boot certificates. It also improves File History backups and stability for some graphics configurations.

    Build 22631.6783
    Security 41 CVEs
    Replaced by KB5082052 →
  • Windows 10 · 21H2, 22H2
    Windows 10 21H2 / 22H2 Windows 10 21H2 / 22H2 Security update
    KB5078885

    Secure Boot certificate rollout expands; File History handles more names

    Addresses 43 Important-severity vulnerabilities and improves Secure Boot certificate targeting, File History backups, and graphics stability. Secure Boot certificates have started expiring in June 2026, so review Microsoft's guidance.

    Builds 19044.7058 19045.7058
    Security 43 CVEs
    Replaced by KB5082200 →
  • Windows 10 · 1809
    Windows 10 1809 Windows 10 1809 Security update Also for Windows Server
    KB5078752

    Secure Boot certificate rollout expands; File History backs up more names

    Secure Boot certificates have started expiring in June 2026, and this update expands phased targeting for devices eligible to receive replacements. It also adds a trusted-source warning in Windows System Image Manager and lets File History back up more filenames.

    Build 17763.8511
    Security 40 CVEs
    Replaced by KB5082123 →