--- title: Medium | daily.dev description: Windows 11's July 2026 Patch Tuesday fixed a record 570 security vulnerabilities — 59 Critical and 254 elevation-of-privilege bugs — roughly triple the... canonical: https://daily.dev/posts/medium-tmqnutrjo twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Medium | daily.dev og:description: Windows 11's July 2026 Patch Tuesday fixed a record 570 security vulnerabilities — 59 Critical and 254 elevation-of-privilege bugs — roughly triple the... og:url: https://daily.dev/posts/medium-tmqnutrjo og:image: https://api.daily.dev/og/posts/tMQnUtRJO.png og:image:alt: Medium 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. # Medium **[Medium](https://daily.dev/sources/medium_js)** · 17 min read · 0 upvotes · 0 comments ## Summary Windows 11's July 2026 Patch Tuesday fixed a record 570 security vulnerabilities — 59 Critical and 254 elevation-of-privilege bugs — roughly triple the previous month's count. Microsoft's AI bug-hunting system MDASH is credited with surfacing a growing share of these findings, as the company races to match AI-assisted attackers. However, the same update cycle revealed significant reliability gaps: a June update broke OLE automation for a month, a critical Defender zero-day fix (RoguePlanet) introduced a new disk-exhaustion bug, and the July update itself had to be blocked on certain Dell PCs due to an Intel driver conflict causing overheating and shutdowns. The piece argues that faster bug discovery via AI hasn't yet been matched by faster, safer shipping — and advises users to update promptly but maintain independent backups, check for Dell compatibility issues, and ensure 200GB free space for the new Point-in-time Restore feature. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Microsoft’s June update fixed 208 security flaws and introduced a cascade of new bugs across all Windows versions](https://daily.dev/posts/microsoft-s-june-update-fixed-208-security-flaws-and-introduced-a-cascade-of-new-bugs-across-all-win-xki0hlkrs) · The Next Web · 1 upvotes · 1 comments --- Tags: [#security](https://daily.dev/tags/security), [#microsoft](https://daily.dev/tags/microsoft), [#windows](https://daily.dev/tags/windows), [#ai-security](https://daily.dev/tags/ai-security) [View this post on daily.dev](https://daily.dev/posts/medium-tmqnutrjo) ```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":"Medium","url":"https://daily.dev/posts/medium-tmqnutrjo","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/medium-tmqnutrjo"},"datePublished":"2026-07-22T17:53:27.433Z","dateModified":"2026-07-22T17:56:46.509Z","description":"Windows 11's July 2026 Patch Tuesday fixed a record 570 security vulnerabilities — 59 Critical and 254 elevation-of-privilege bugs — roughly triple the...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/466e9b2008865a984975fe668288b1e0?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/466e9b2008865a984975fe668288b1e0?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Medium","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":"Medium","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/medium","url":"https://daily.dev/sources/medium_js"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/medium-tmqnutrjo","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"security,microsoft,windows,ai-security","timeRequired":"PT17M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Medium","item":"https://daily.dev/sources/medium_js"},{"@type":"ListItem","position":3,"name":"Medium"}]} ```