--- title: Windows 11 KB5121003 & KB5120240 cumulative updates released description: Microsoft released Windows 11 cumulative updates KB5121003 and KB5120240 for versions 25H2/24H2 and 23H2 as part of the August 2026 Patch Tuesday, addressing... canonical: https://daily.dev/posts/windows-11-kb5121003-kb5120240-cumulative-updates-released-ajxrtajfl twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Windows 11 KB5121003 & KB5120240 cumulative updates released | daily.dev og:description: Microsoft released Windows 11 cumulative updates KB5121003 and KB5120240 for versions 25H2/24H2 and 23H2 as part of the August 2026 Patch Tuesday, addressing... og:url: https://daily.dev/posts/windows-11-kb5121003-kb5120240-cumulative-updates-released-ajxrtajfl og:image: https://api.daily.dev/og/posts/AJxRtaJfL.png og:image:alt: Windows 11 KB5121003 & KB5120240 cumulative updates released og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Windows 11 KB5121003 & KB5120240 cumulative updates released **[BleepingComputer](https://daily.dev/sources/bleepingcomputer)** · 6 min read · 1 upvotes · 0 comments ## Summary Microsoft released Windows 11 cumulative updates KB5121003 and KB5120240 for versions 25H2/24H2 and 23H2 as part of the August 2026 Patch Tuesday, addressing 400 security vulnerabilities. Key improvements include File Explorer showing file sizes in appropriate units (KB/MB/GB), typo-tolerant Windows Search, Voice Access gaining Voice Isolation with three speech recognition modes and Korean language support, new touchpad gesture controls for scroll/zoom speed and accelerated scrolling, Windows Hello Enhanced Sign-in Security now supporting peripheral fingerprint sensors, taskbar notification badges adopting the Windows accent color, and various reliability fixes for power settings, Start menu, and the system tray. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What do the Windows 11 KB5121003 and KB5120240 updates fix and add? They deliver the August 2026 Patch Tuesday security patches covering roughly 400 vulnerabilities plus new features and reliability fixes. Highlights include Voice Isolation and Korean support for Voice Access, Windows Hello Enhanced Sign-in Security support for peripheral fingerprint sensors, accent-colored taskbar notification badges, new precision touchpad gesture settings, and an option to remove the Image Generation AI component on Copilot+ PCs. _Track cumulative update changes like these on daily.dev before rolling out Windows 11 patches fleet-wide._ ### Do Windows 11 24H2 and 25H2 get different fixes in the same cumulative update? No, KB5121003 and KB5120240 are built on the same 24H2 servicing branch, so 25H2 receives identical fixes with no version-exclusive changes. Both editions get the same File Explorer, Voice Access, Windows Hello, and touchpad improvements from this release. _Compare update behavior across Windows 11 versions on daily.dev when planning deployment schedules._ ### How do I enroll a peripheral fingerprint reader for Windows Hello Enhanced Sign-in Security? Plug in a supported ESS fingerprint reader, then go to Settings > Accounts > Sign in options and follow the enrollment prompts. This extends secure sign-in beyond built-in sensors to desktops and other Windows 11 PCs, including Copilot+ PCs, a capability first disclosed in January 2026 via KB5074105 and now rolling out. _Follow security feature rollouts such as Windows Hello ESS updates on daily.dev to plan hardware support._ ## Similar posts on daily.dev - [Windows 11 KB5089549 & KB5087420 cumulative updates released](https://daily.dev/posts/windows-11-kb5089549-kb5087420-cumulative-updates-released-aznw5thdt) · BleepingComputer · 0 upvotes · 0 comments - [Windows 11 KB5101684 update released with 42 changes and fixes](https://daily.dev/posts/windows-11-kb5101684-update-released-with-42-changes-and-fixes-qdqjrjdeb) · BleepingComputer · 4 upvotes · 0 comments - [Microsoft's behind-the-scenes Windows 11 speed boost is already rolling out](https://daily.dev/posts/microsoft-s-behind-the-scenes-windows-11-speed-boost-is-already-rolling-out-ljs7eh6hc) · XDA Developers · 0 upvotes · 0 comments - [Releasing Windows 11 Builds 26100.8106 and 26200.8106 to the Release Preview Channel](https://daily.dev/posts/releasing-windows-11-builds-26100-8106-and-26200-8106-to-the-release-preview-channel-yijfcc36l) · Windows Blogs · 0 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security), [#microsoft](https://daily.dev/tags/microsoft), [#windows](https://daily.dev/tags/windows) [View this post on daily.dev](https://daily.dev/posts/windows-11-kb5121003-kb5120240-cumulative-updates-released-ajxrtajfl) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Windows 11 KB5121003 & KB5120240 cumulative updates released","url":"https://daily.dev/posts/windows-11-kb5121003-kb5120240-cumulative-updates-released-ajxrtajfl","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/windows-11-kb5121003-kb5120240-cumulative-updates-released-ajxrtajfl"},"datePublished":"2026-08-11T17:39:45.476Z","dateModified":"2026-09-14T07:29:45.773Z","description":"Microsoft released Windows 11 cumulative updates KB5121003 and KB5120240 for versions 25H2/24H2 and 23H2 as part of the August 2026 Patch Tuesday, addressing...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/da16989e5b637f682e46e7ab1c9e40e2?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/da16989e5b637f682e46e7ab1c9e40e2?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"BleepingComputer","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"BleepingComputer","logo":"https://media.daily.dev/image/upload/s--as8nJ3qy--/f_auto,q_auto/v1774959951/logos/bleepingcomputer?_a=BAMAMiWQ0","url":"https://daily.dev/sources/bleepingcomputer"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/windows-11-kb5121003-kb5120240-cumulative-updates-released-ajxrtajfl","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"security,microsoft,windows","timeRequired":"PT6M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"BleepingComputer","item":"https://daily.dev/sources/bleepingcomputer"},{"@type":"ListItem","position":3,"name":"Windows 11 KB5121003 & KB5120240 cumulative updates released"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/windows-11-kb5121003-kb5120240-cumulative-updates-released-ajxrtajfl#faq","mainEntity":[{"@type":"Question","name":"What do the Windows 11 KB5121003 and KB5120240 updates fix and add?","acceptedAnswer":{"@type":"Answer","text":"They deliver the August 2026 Patch Tuesday security patches covering roughly 400 vulnerabilities plus new features and reliability fixes. Highlights include Voice Isolation and Korean support for Voice Access, Windows Hello Enhanced Sign-in Security support for peripheral fingerprint sensors, accent-colored taskbar notification badges, new precision touchpad gesture settings, and an option to remove the Image Generation AI component on Copilot+ PCs. Track cumulative update changes like these on daily.dev before rolling out Windows 11 patches fleet-wide."}},{"@type":"Question","name":"Do Windows 11 24H2 and 25H2 get different fixes in the same cumulative update?","acceptedAnswer":{"@type":"Answer","text":"No, KB5121003 and KB5120240 are built on the same 24H2 servicing branch, so 25H2 receives identical fixes with no version-exclusive changes. Both editions get the same File Explorer, Voice Access, Windows Hello, and touchpad improvements from this release. Compare update behavior across Windows 11 versions on daily.dev when planning deployment schedules."}},{"@type":"Question","name":"How do I enroll a peripheral fingerprint reader for Windows Hello Enhanced Sign-in Security?","acceptedAnswer":{"@type":"Answer","text":"Plug in a supported ESS fingerprint reader, then go to Settings > Accounts > Sign in options and follow the enrollment prompts. This extends secure sign-in beyond built-in sensors to desktops and other Windows 11 PCs, including Copilot+ PCs, a capability first disclosed in January 2026 via KB5074105 and now rolling out. Follow security feature rollouts such as Windows Hello ESS updates on daily.dev to plan hardware support."}}]} ```