All updates

Publicly disclosed .NET security bypass addressed

The update addresses 21 vulnerabilities, including one critical flaw. CVE-2026-108398 could bypass a .NET Framework security protection and was publicly disclosed.

Build symbols return after being missing in the previous flight

Includes general improvements and fixes, and symbols should be available again. The notes also list internet access and VMware issues under investigation.

Windows Search inline actions and Narrator math reading

Experimental Channel Insiders get a redesigned Windows Search with inline actions, Narrator math reading and navigation, and improved taskbar settings persistence across monitor changes.

Overall experience improvements for Beta Channel PCs

Build 28020.3172 gradually brings a small set of general improvements and fixes to Insiders in the Beta Channel.

Windows Search actions and a battery status widget

Adds inline actions to Windows Search and a battery widget, and fixes several crashes and taskbar lag. These changes are for Windows Insiders, not everyday devices.

Weather on the lock screen and cloud-based PC recovery

Makes Weather the primary lock-screen widget, adds Cloud rebuild recovery, and fixes crashes in some apps and games.

Favorite apps in Share and new downloaded-file previews

Adds app pinning in Windows Share and changes File Explorer previews for downloaded files, alongside fixes for audio, Remote Desktop, and performance.

Magnifier zoom controls and drive sanitizing during Cloud rebuild

Adds more precise Magnifier zoom controls and drive sanitizing during Cloud rebuild, alongside File Explorer improvements and fixes.

Cloud rebuild and more precise Magnifier zoom

Build 28020.3142 is rolling out to Beta Channel Insiders with Cloud rebuild, more precise Magnifier zoom controls, and File Explorer improvements and fixes.

Unicode text support and quicker profile-folder navigation

Updates Unicode text support, adds `~` shortcuts in File Explorer, and adds a Settings entry for Cloud Rebuild. Settings improvements should reduce loading times in certain scenarios.

Unicode 17.0 text support and faster Settings loading

Beta Channel Insiders get Unicode 17.0 text support and faster loading on the Settings home page. The update also removes the cloud recovery entry point.

Exchange vulnerabilities patched; hybrid free/busy times corrected

Nine Exchange vulnerabilities are addressed, and two hybrid mailbox problems are resolved: wrapper messages in shared mailboxes and shifted free/busy times.

Published calendar feeds can fail with HTTP 500

Addresses 9 vulnerabilities in Exchange Server 2019 CU15. A known issue can stop published calendar subscriptions from refreshing and return HTTP 500; an IIS workaround is available.

Hybrid shared-mailbox wrapper messages fixed; calendar feeds may fail

Fixes a hybrid shared-mailbox message issue and addresses 9 vulnerabilities. It is available only to organizations in the Period 2 ESU program; published calendar feeds can still return HTTP 500.

Shared mailbox wrapper messages fixed; published calendars can fail

Fixes wrapper messages appearing in shared mailboxes in hybrid environments. Published calendar subscriptions can still return HTTP 500; KB5128898 later resolves the issue for Exchange Server 2016 CU23.

Small changes to the overall experience on PCs

Brings general improvements and fixes to PCs in the Experimental Channel.

Plan9 folder access fixed in some virtual machine apps

Beta Channel Insiders receive a gradual fix for Plan9 folder sharing in some applications that use HCS-managed virtual machines, plus a small set of general improvements.

More Start activity and broader Narrator math reading support

Build 26340.9577 for the Experimental Channel gradually adds more phone activity in Start, expands Narrator math reading, and brings other changes and a USB audio fix.

Pointer Indicator and a lower-glare Magnifier theme

Adds Pointer Indicator, previews of Phone Link activity in Start, and a Magnifier contrast theme. It also adds dark mode to File Explorer Folder Options and fixes an issue with some USB audio devices.

New touchpad gestures, emoji and Widgets; Remote Desktop issue remains

Adds Windows features and fixes several problems, but non-admin Remote Desktop connections might still fail on managed devices with Administrator protection enabled. It is the final preview for version 24H2.

Remote Desktop failures reported; taskbar moves to four screen edges

Adds taskbar and Start menu customization, while some non-admin Remote Desktop connections can fail on devices with Administrator protection enabled.

Hyper-V folder sharing and UAC freeze fixes

Fixes Linux VM folder sharing and freezes triggered by UAC prompts. The notes also list unresolved performance and VMware issues.

Cloud rebuild and a fix for Linux shared folders

Adds Cloud rebuild for reinstalling Windows from Recovery and fixes Plan9 folder sharing with Linux VMs. It also resolves an Easy Anti-Cheat launch issue.

Magnifier contrast themes and Cloud rebuild drive sanitizing

Adds Magnifier contrast themes and new Cloud rebuild options, and fixes Plan9 folder sharing with Linux VMs and File History backups.

Live Captions screen reader setting and File History backup fix

Beta Channel Insiders get a new Live Captions setting for screen reader audio, plus fixes for Linux VM folder sharing and File History backups.