--- title: Microsoft August 2026 Patch Tuesday fixes 400 flaws, 3... description: Microsoft's August 2026 Patch Tuesday addresses a massive 400 security vulnerabilities across a wide range of products, including Windows, Microsoft Office... canonical: https://daily.dev/posts/microsoft-august-2026-patch-tuesday-fixes-400-flaws-3-zero-days-ihtrqklzh twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Microsoft August 2026 Patch Tuesday fixes 400 flaws, 3 zero-days | daily.dev og:description: Microsoft's August 2026 Patch Tuesday addresses a massive 400 security vulnerabilities across a wide range of products, including Windows, Microsoft Office... og:url: https://daily.dev/posts/microsoft-august-2026-patch-tuesday-fixes-400-flaws-3-zero-days-ihtrqklzh og:image: https://api.daily.dev/og/posts/ihTrqKLZh.png og:image:alt: Microsoft August 2026 Patch Tuesday fixes 400 flaws, 3 zero-days 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. # Microsoft August 2026 Patch Tuesday fixes 400 flaws, 3 zero-days **[BleepingComputer](https://daily.dev/sources/bleepingcomputer)** · 25 min read · 0 upvotes · 0 comments ## Summary Microsoft's August 2026 Patch Tuesday addresses a massive 400 security vulnerabilities across a wide range of products, including Windows, Microsoft Office (Word, Excel, SharePoint, Outlook, PowerPoint, Access), Azure services, Exchange Server, .NET, and more. The update includes three zero-day vulnerabilities — one actively exploited in the wild and two publicly disclosed. Critical-severity fixes span Azure Active Directory, Azure SQL Database, Microsoft Exchange Server, Microsoft 365 Admin Center, and several Office components with remote code execution potential. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How many vulnerabilities did Microsoft fix in the August 2026 Patch Tuesday update? Microsoft fixed 400 vulnerabilities in the August 2026 Patch Tuesday release. The update includes three zero-day vulnerabilities — one actively exploited in the wild and two publicly disclosed. Critical-severity patches cover Azure Active Directory, Azure SQL Database, Microsoft Exchange Server, Microsoft 365 Admin Center, and multiple Office components including Word, Excel, and SharePoint. _Teams responsible for Windows environments track Patch Tuesday releases like this one on daily.dev to prioritize patching before exploits spread._ ## Similar posts on daily.dev - [Microsoft May 2026 Patch Tuesday fixes 120 flaws, no zero-days](https://daily.dev/posts/microsoft-may-2026-patch-tuesday-fixes-120-flaws-no-zero-days-phndtxk8i) · BleepingComputer · 0 upvotes · 0 comments - [Microsoft Patch Tuesday, March 2026 Edition – Krebs on Security](https://daily.dev/posts/microsoft-patch-tuesday-march-2026-edition-krebs-on-security-vio6duyhq) · Krebs on Security · 0 upvotes · 0 comments - [February 2026 Patch Tuesday: Six new and actively exploited Microsoft vulnerabilities addressed](https://daily.dev/posts/february-2026-patch-tuesday-six-new-and-actively-exploited-microsoft-vulnerabilities-addressed-uxvhpzt2r) · CSO Online · 0 upvotes · 0 comments - [Microsoft October Patch Tuesday Is Huge With 170\+ Fixes](https://daily.dev/posts/microsoft-october-patch-tuesday-is-huge-with-170-fixes-buuchjvvb) · Latest Hacking News · 1 upvotes · 0 comments --- Tags: [#microsoft](https://daily.dev/tags/microsoft), [#windows](https://daily.dev/tags/windows), [#vulnerability](https://daily.dev/tags/vulnerability), [#zero-day](https://daily.dev/tags/zero-day) [View this post on daily.dev](https://daily.dev/posts/microsoft-august-2026-patch-tuesday-fixes-400-flaws-3-zero-days-ihtrqklzh) ```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":"Microsoft August 2026 Patch Tuesday fixes 400 flaws, 3 zero-days","url":"https://daily.dev/posts/microsoft-august-2026-patch-tuesday-fixes-400-flaws-3-zero-days-ihtrqklzh","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/microsoft-august-2026-patch-tuesday-fixes-400-flaws-3-zero-days-ihtrqklzh"},"datePublished":"2026-08-11T18:10:23.270Z","dateModified":"2026-08-12T00:51:01.571Z","description":"Microsoft's August 2026 Patch Tuesday addresses a massive 400 security vulnerabilities across a wide range of products, including Windows, Microsoft Office...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/b0e2bba0f2176f386fe61444f465f03b?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/b0e2bba0f2176f386fe61444f465f03b?_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/microsoft-august-2026-patch-tuesday-fixes-400-flaws-3-zero-days-ihtrqklzh","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"microsoft,windows,vulnerability,zero-day","timeRequired":"PT25M"} {"@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":"Microsoft August 2026 Patch Tuesday fixes 400 flaws, 3 zero-days"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/microsoft-august-2026-patch-tuesday-fixes-400-flaws-3-zero-days-ihtrqklzh#faq","mainEntity":[{"@type":"Question","name":"How many vulnerabilities did Microsoft fix in the August 2026 Patch Tuesday update?","acceptedAnswer":{"@type":"Answer","text":"Microsoft fixed 400 vulnerabilities in the August 2026 Patch Tuesday release. The update includes three zero-day vulnerabilities — one actively exploited in the wild and two publicly disclosed. Critical-severity patches cover Azure Active Directory, Azure SQL Database, Microsoft Exchange Server, Microsoft 365 Admin Center, and multiple Office components including Word, Excel, and SharePoint. Teams responsible for Windows environments track Patch Tuesday releases like this one on daily.dev to prioritize patching before exploits spread."}}]} ```