{"id":216668,"date":"2026-09-08T19:03:54","date_gmt":"2026-09-08T17:03:54","guid":{"rendered":"https:\/\/www.deskmodder.de\/blog\/?p=216668"},"modified":"2026-09-08T19:03:54","modified_gmt":"2026-09-08T17:03:54","slug":"kb5124012-windows-11-26h1-manueller-download-sicherheitsupdate-09-26","status":"publish","type":"post","link":"https:\/\/www.deskmodder.de\/blog\/2026\/09\/08\/kb5124012-windows-11-26h1-manueller-download-sicherheitsupdate-09-26\/","title":{"rendered":"KB5124012 Windows 11 26H1 [Manueller Download] Sicherheitsupdate  09\/26"},"content":{"rendered":"<p>Microsoft hat f\u00fcr die Windows 11 26H1 nat\u00fcrlich auch ein neues Sicherheitsupdate bereitgestellt. Heute, am 2. Dienstag im Monat, ist es die KB 5124012. Die Versionsnummer \u00e4ndert sich dadurch auf die Windows 11 26H1 28000.2954.<\/p>\n<p><a href=\"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2026\/09\/kb5124012-windows-11-26h1.jpg\" rel=\"lightbox[216668]\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2026\/09\/kb5124012-windows-11-26h1-500x358.jpg\" alt=\"\" width=\"500\" height=\"358\" class=\"aligncenter size-medium wp-image-216669\" srcset=\"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2026\/09\/kb5124012-windows-11-26h1-500x358.jpg 500w, https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2026\/09\/kb5124012-windows-11-26h1-810x580.jpg 810w, https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2026\/09\/kb5124012-windows-11-26h1-286x205.jpg 286w, https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2026\/09\/kb5124012-windows-11-26h1.jpg 981w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/p>\n<p>Die Windows 11 26H1 ist eine <a href=\"https:\/\/www.deskmodder.de\/blog\/2026\/02\/11\/windows-11-26h1-bleibt-bis-2027-bei-der-26h1\/\" target=\"_blank\">spezielle Version<\/a>. Sie wird kein Update auf die neue Windows 11 26H2 erhalten. Und zwar weil hier die Versionsnummer mit der 28000 schon h\u00f6her ist, wie die der 26H2 mit 26300. Das wird sich dann offensichtlich mit der 27H2 wieder \u00e4ndern.<\/p>\n<p>Aber zur\u00fcck zum heutigen Update. Integriert wurden die \u00c4nderungen aus dem <a href=\"https:\/\/www.deskmodder.de\/blog\/2026\/08\/27\/kb5120996-windows-11-26h1-manueller-download-als-optionales-update-august\/\" target=\"_blank\">optionalen Update KB5120996<\/a> von Ende August. Hier wurden einige Verbesserungen vorgenommen.<\/p>\n<h3>Bekannte Probleme durch die KB5124012<\/h3>\n<h3>Korrekturen und Verbesserungen durch die KB5124012<\/h3>\n<ul>\n<li>Dieses Update behebt Sicherheitsprobleme im Windows-Betriebssystem.<\/li>\n<li>Die einzelnen Sicherheitsl\u00fccken, die geschlossen wurden, k\u00f6nnt ihr <a href=\"https:\/\/msrc.microsoft.com\/update-guide\/\" target=\"_blank\">hier nachlesen<\/a><\/li>\n<li>Rest folgt<\/li>\n<li><a href=\"https:\/\/support.microsoft.com\/help\/5124012\" target=\"_blank\">support.microsoft<\/a><\/li>\n<\/ul>\n<h3>Manueller Download der KB5124012<\/h3>\n<ul>\n<li><a href=\"https:\/\/catalog.sf.dl.delivery.mp.microsoft.com\/filestreamingservice\/files\/c0f9948f-d30a-4c3b-af27-08323e66a2ce\/public\/windows11.0-kb5124012-x64_85abefda703d7f250fe73babfe784f826682e284.msu\" target=\"_blank\">Windows11.0-KB5124012-x64.msu<\/a><\/li>\n<li>ARM: <a href=\"https:\/\/catalog.sf.dl.delivery.mp.microsoft.com\/filestreamingservice\/files\/6dad3e85-dda5-4f32-b946-8b8444607945\/public\/windows11.0-kb5124012-arm64_96333a7811e165eafd98ac975832f8ca297de78c.msu\" target=\"_blank\">Windows11.0-KB5124012-arm64.msu<\/a><\/li>\n<\/ul>\n<h3>Windows 11 Tutorials und Hilfe<\/h3>\n<ul>\n<li>In unserem <a href=\"https:\/\/www.deskmodder.de\/wiki\/index.php?title=Kategorie:Windows_11\" rel=\"noopener noreferrer\" target=\"_blank\">Windows 11 Wiki<\/a> findet ihr sehr viele hilfreiche Tipps und Tricks.<\/li>\n<li>Falls ihr Fragen habt, dann stellt diese ganz einfach bei uns im <a href=\"https:\/\/www.deskmodder.de\/phpBB3\/viewforum.php?f=353\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Forum<\/strong><\/a>.<\/li>\n<li><strong>Installationsmedien:<\/strong> Aktuelle Windows 11 ISOs findet ihr hier: <a href=\"https:\/\/www.deskmodder.de\/blog\/2026\/01\/28\/windows-11-26h2-26300-iso-esd-deutsch-english\/\" rel=\"noopener\" target=\"_blank\">26H2 26300<\/a> und hier <a href=\"https:\/\/www.deskmodder.de\/blog\/2025\/06\/28\/windows-11-25h2-26200-iso-esd-deutsch-english\/\" rel=\"noopener\" target=\"_blank\">25H2 26200<\/a>. Ansonsten <a href=\"https:\/\/www.deskmodder.de\/blog\/#:~:text=l%C3%A4dt%20die%2019045.3803-,Download%2DBereich,-Windows%2011%20ISO\" rel=\"noopener\" target=\"_blank\">immer in der rechten Sidebar<\/a>.<\/li>\n<li><a href=\"https:\/\/www.deskmodder.de\/wiki\/index.php?title=Windows_11_neu_clean_installieren_Tipps_und_Tricks\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Windows 11 neu clean installieren Tipps und Tricks<\/strong><\/a>.<\/li>\n<li><a href=\"https:\/\/www.deskmodder.de\/wiki\/index.php?title=Windows_11_auch_ohne_TPM_und_Secure_Boot_installieren\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Windows 11 auch ohne TPM und Secure Boot installieren<\/strong><\/a>.<\/li>\n<li><a href=\"https:\/\/www.deskmodder.de\/wiki\/index.php?title=Windows_11_mit_einem_lokalen_oder_Microsoft_Konto_installieren\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Windows 11 mit lokalem Konto auch Offline installieren<\/strong><\/a>.<\/li>\n<li><a href=\"https:\/\/www.deskmodder.de\/wiki\/index.php?title=Windows_11_Inplace_Upgrade_Reparatur_oder_Feature_Update\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Windows 11 Inplace Upgrade Reparatur oder Feature Update<\/strong><\/a>.<\/li>\n<li><a href=\"https:\/\/www.deskmodder.de\/wiki\/index.php?title=Automatisch_anmelden_Pin_entfernen_Windows_11\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Automatisch anmelden Pin entfernen Windows 11<\/strong><\/a>.<\/li>\n<li>Alle Beitr\u00e4ge zu Windows 11 im Blog findet ihr <a href=\"https:\/\/www.deskmodder.de\/blog\/category\/windows-11\/\" rel=\"noopener\" target=\"_blank\">\u00fcber diese Seite<\/a>. Wobei auch <a href=\"https:\/\/www.deskmodder.de\/blog\/\" rel=\"noopener\" target=\"_blank\">alle anderen Artikel<\/a> interessant sein k\u00f6nnen.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Microsoft hat f\u00fcr die Windows 11 26H1 nat\u00fcrlich auch ein neues Sicherheitsupdate bereitgestellt. Heute, am 2. Dienstag im Monat, ist es die KB 5124012. Die Versionsnummer \u00e4ndert sich dadurch auf die Windows 11 26H1 28000.2954. Die Windows 11 26H1 ist&hellip; <\/p>\n","protected":false},"author":134,"featured_media":153427,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[80310],"tags":[98184,98183,94434,95225],"class_list":["post-216668","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-windows-11","tag-kb-5124012","tag-kb5124012","tag-windows-11-26h1","tag-windows-11-26h1-update"],"wp_featured_image":{"id":153427,"alt_text":"","description":"","media_type":"image","media_details":{"width":978,"height":584,"file":"2021\/05\/windows-10-update-logo.jpg","sizes":{"medium":{"file":"windows-10-update-logo-500x299.jpg","width":500,"height":299,"mime-type":"image\/jpeg","source_url":"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2021\/05\/windows-10-update-logo-500x299.jpg"},"large":{"file":"windows-10-update-logo-810x484.jpg","width":810,"height":484,"mime-type":"image\/jpeg","source_url":"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2021\/05\/windows-10-update-logo-810x484.jpg"},"thumbnail":{"file":"windows-10-update-logo-306x183.jpg","width":306,"height":183,"mime-type":"image\/jpeg","source_url":"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2021\/05\/windows-10-update-logo-306x183.jpg"},"blog-large":{"file":"windows-10-update-logo-642x300.jpg","width":642,"height":300,"mime-type":"image\/jpeg","source_url":"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2021\/05\/windows-10-update-logo-642x300.jpg"},"blog-medium":{"file":"windows-10-update-logo-306x205.jpg","width":306,"height":205,"mime-type":"image\/jpeg","source_url":"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2021\/05\/windows-10-update-logo-306x205.jpg"},"recent-thumb":{"file":"windows-10-update-logo-350x316.jpg","width":350,"height":316,"mime-type":"image\/jpeg","source_url":"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2021\/05\/windows-10-update-logo-350x316.jpg"},"service-featured":{"file":"windows-10-update-logo-600x330.jpg","width":600,"height":330,"mime-type":"image\/jpeg","source_url":"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2021\/05\/windows-10-update-logo-600x330.jpg"},"wp_rp_thumbnail":{"file":"windows-10-update-logo-50x50.jpg","width":50,"height":50,"mime-type":"image\/jpeg","source_url":"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2021\/05\/windows-10-update-logo-50x50.jpg"}},"image_meta":{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0","keywords":[]}},"post":155113,"source_url":"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2021\/05\/windows-10-update-logo.jpg"},"commentcount":0,"wp_comments":[],"wp_author":{"id":134,"name":"moinmoin","description":"Ich bin nicht allwissend, was <a href=\"https:\/\/www.deskmodder.de\/wiki\/index.php?title=Kategorie:Windows_11\">Windows<\/a> angeht. Aber genau deshalb nehme ich Windows gerne auseinander und unter die Lupe, um all mein Wissen zu erweitern. <i>J\u00fcrgen<\/i>","author_avatar_urls":{"24":"https:\/\/secure.gravatar.com\/avatar\/fab96769102f8886245ab411df9a42a235be79261e4b44aa7ab2a555da8b86b4?s=24&d=mm&r=g","48":"https:\/\/secure.gravatar.com\/avatar\/fab96769102f8886245ab411df9a42a235be79261e4b44aa7ab2a555da8b86b4?s=48&d=mm&r=g","96":"https:\/\/secure.gravatar.com\/avatar\/fab96769102f8886245ab411df9a42a235be79261e4b44aa7ab2a555da8b86b4?s=96&d=mm&r=g"}},"cld_nonce":"95f417540e","yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.4 (Yoast SEO v28.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>KB5124012 Windows 11 26H1 [Manueller Download] Sicherheitsupdate 09\/26 - Deskmodder.de<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.deskmodder.de\/blog\/2026\/09\/08\/kb5124012-windows-11-26h1-manueller-download-sicherheitsupdate-09-26\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"KB5124012 Windows 11 26H1 [Manueller Download] Sicherheitsupdate 09\/26\" \/>\n<meta property=\"og:description\" content=\"Microsoft hat f\u00fcr die Windows 11 26H1 nat\u00fcrlich auch ein neues Sicherheitsupdate bereitgestellt. Heute, am 2. Dienstag im Monat, ist es die KB 5124012. Die Versionsnummer \u00e4ndert sich dadurch auf die Windows 11 26H1 28000.2954. Die Windows 11 26H1 ist&hellip;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.deskmodder.de\/blog\/2026\/09\/08\/kb5124012-windows-11-26h1-manueller-download-sicherheitsupdate-09-26\/\" \/>\n<meta property=\"og:site_name\" content=\"Deskmodder.de\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Deskmodder\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-08T17:03:54+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2021\/05\/windows-10-update-logo.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"978\" \/>\n\t<meta property=\"og:image:height\" content=\"584\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"moinmoin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@Deskmodder\" \/>\n<meta name=\"twitter:site\" content=\"@Deskmodder\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/2026\\\/09\\\/08\\\/kb5124012-windows-11-26h1-manueller-download-sicherheitsupdate-09-26\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/2026\\\/09\\\/08\\\/kb5124012-windows-11-26h1-manueller-download-sicherheitsupdate-09-26\\\/\"},\"author\":{\"name\":\"moinmoin\",\"@id\":\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/#\\\/schema\\\/person\\\/a40b17a9503c4a1568ac4073bb54182a\"},\"headline\":\"KB5124012 Windows 11 26H1 [Manueller Download] Sicherheitsupdate 09\\\/26\",\"datePublished\":\"2026-09-08T17:03:54+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/2026\\\/09\\\/08\\\/kb5124012-windows-11-26h1-manueller-download-sicherheitsupdate-09-26\\\/\"},\"wordCount\":252,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/2026\\\/09\\\/08\\\/kb5124012-windows-11-26h1-manueller-download-sicherheitsupdate-09-26\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/wp-content\\\/uploads\\\/2021\\\/05\\\/windows-10-update-logo.jpg\",\"keywords\":[\"KB 5124012\",\"KB5124012\",\"Windows 11 26H1\",\"Windows 11 26H1 Update\"],\"articleSection\":[\"Windows 11\"],\"inLanguage\":\"de\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/2026\\\/09\\\/08\\\/kb5124012-windows-11-26h1-manueller-download-sicherheitsupdate-09-26\\\/#respond\"]}],\"copyrightYear\":\"2026\",\"copyrightHolder\":{\"@id\":\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/2026\\\/09\\\/08\\\/kb5124012-windows-11-26h1-manueller-download-sicherheitsupdate-09-26\\\/\",\"url\":\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/2026\\\/09\\\/08\\\/kb5124012-windows-11-26h1-manueller-download-sicherheitsupdate-09-26\\\/\",\"name\":\"KB5124012 Windows 11 26H1 [Manueller Download] Sicherheitsupdate 09\\\/26 - 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