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The Update Bureau

Monthly Patch Briefing

April 2026

60 updates released this month .

Updates, page 3

Updates, page 3:
  • .NET Framework · 4.8
    .NET Framework 4.8 .NET Framework 4.8 for Windows 10 1607 · Windows Server 2016 Security update
    KB5082411

    Critical runtime denial-of-service flaw addressed; ClickOnce checks updated

    ClickOnce checks now support SHA384 and SHA512. The update addresses six security flaws, including critical CVE-2026-23666, which can make a service unavailable.

    Build 4.8.4801.0
    Security 6 CVEs 1 critical
    Replaced by KB5087065 →
  • .NET Framework · 3.5, 4.7.2
    .NET Framework 3.5 / 4.7.2 .NET Framework 3.5 / 4.7.2 for Windows 10 1809 · Windows Server 2019 Security update
    KB5082413

    Critical service-disruption flaw addressed; ClickOnce checks expanded

    Six .NET Framework security flaws are addressed, including one critical flaw that could stop a service from responding. ClickOnce also gains support for SHA384 and SHA512 checks.

    Builds 4.7.4141.0 2.0.50727.9068
    Security 6 CVEs 1 critical
    Replaced by KB5087061 →
  • Windows 11 · Future platforms
    Windows 11 Windows 11 Insider Future platforms Insider Preview
    Experimental Channel
    Build 29565.1000

    Secure Boot certificate status and a smaller drag tray preview

    Build 29565.1000 for the Experimental Channel gradually rolls out Secure Boot certificate details, a smaller drag tray preview, and Feedback Hub changes, alongside fixes to feedback listings and upvote buttons.

    Changes 1 new · 4 improved · 2 fixes
  • Windows 11 · 26H1
    Windows 11 Windows 11 Insider 26H1 Insider Preview
    Experimental Channel
    Build 28020.1812

    Touchpad right-click sizing and Secure Boot certificate status

    Adds a touchpad right-click zone setting and Secure Boot status details, and refines the drag tray and Feedback Hub.

    Changes 1 new · 5 improved · 2 fixes
  • Windows 11 · 26H2
    Windows 11 Windows 11 Insider 26H2 Insider Preview
    Experimental Channel
    Build 26300.8170

    FAT32 formatting limit rises to 2 TB; Secure Boot status in Security

    Build 26300.8170 is rolling out gradually to Dev Channel Insiders with the latest-updates toggle, raising the command-line FAT32 formatting limit and updating Storage, Secure Boot status, and Feedback Hub.

    Package KB5083632
    Changes 1 new · 5 improved · 3 fixes
  • Windows 11 · 25H2
    Windows 11 Windows 11 Insider 25H2 Insider Preview
    Beta Channel
    Build 26220.8165

    FAT32 formatting limit rises and Feedback Hub gets a redesign

    Beta Channel Insiders get a higher command-line FAT32 formatting limit, a redesigned Feedback Hub, and clearer Secure Boot certificate status. The build also fixes inflated Data Usage figures.

    Package KB5083635
    Changes 4 new · 8 improved · 1 fix
  • Windows 11 · Future platforms
    Windows 11 Windows 11 Insider Future platforms Insider Preview
    Experimental Channel
    Build 29560.1000

    Some freeze and USB problems fixed; screensaver setting more reliable

    Fixes issues that caused more freezes and stopped attached USB devices from working for some Insiders. It also improves reliability when setting Screensaver Settings back to None.

    Changes 2 improved · 2 fixes
  • Windows 11 · 26H1
    Windows 11 Windows 11 Insider 26H1 Insider Preview
    Experimental Channel
    Build 28020.1803

    Pen tail button options and an `sfc /scannow` error fix

    Build 28020.1803 for the Canary Channel refines Pen settings, improves voice typing and updates the Developer Mode dialog. It also removes an unexpected error from `sfc /scannow`; the changes are rolling out gradually.

    Changes 1 new · 2 improved · 1 fix
  • Windows 11 · 26H2
    Windows 11 Windows 11 Insider 26H2 Insider Preview
    Experimental Channel
    Build 26300.8155

    Mouse haptic feedback and Xbox mode improvements

    Adds haptic feedback on compatible input devices, updates Xbox mode, improves startup app performance, and fixes sign-in and printing issues.

    Package KB5083822
    Changes 1 new · 3 improved · 2 fixes
  • Windows 11 · 25H2
    Windows 11 Windows 11 Insider 25H2 Insider Preview
    Beta Channel
    Build 26220.8148

    Input-device haptics and a printer support indicator

    Build 26220.8148 for Beta Channel Insiders adds haptic feedback on compatible input devices and a printer support indicator, and improves app startup performance and printing reliability.

    Package KB5083825
    Changes 2 new · 3 improved · 2 fixes