--- title: Microsoft fixes RoguePlanet zero-day in Defender | daily.dev description: Microsoft has patched CVE-2026-50656 (RoguePlanet), a zero-day elevation of privilege vulnerability in Microsoft Defender that allowed attackers with standard... canonical: https://daily.dev/posts/microsoft-fixes-rogueplanet-zero-day-in-defender-dm8n7bx1x twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Microsoft fixes RoguePlanet zero-day in Defender | daily.dev og:description: Microsoft has patched CVE-2026-50656 (RoguePlanet), a zero-day elevation of privilege vulnerability in Microsoft Defender that allowed attackers with standard... og:url: https://daily.dev/posts/microsoft-fixes-rogueplanet-zero-day-in-defender-dm8n7bx1x og:image: https://api.daily.dev/og/posts/dm8N7bX1X.png og:image:alt: Microsoft fixes RoguePlanet zero-day in Defender 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 fixes RoguePlanet zero-day in Defender **[Security Boulevard](https://daily.dev/sources/securityboulevard)** · 3 min read · 0 upvotes · 0 comments ## Summary Microsoft has patched CVE-2026-50656 (RoguePlanet), a zero-day elevation of privilege vulnerability in Microsoft Defender that allowed attackers with standard user access to escalate to NT AUTHORITY\SYSTEM. The fix is delivered via Microsoft Malware Protection Engine version 1.1.26060.3008. Most users are already protected through automatic updates, but manual verification steps are provided to confirm the patched engine version is installed. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Microsoft patches RoguePlanet Defender zero-day vulnerability](https://daily.dev/posts/microsoft-patches-rogueplanet-defender-zero-day-vulnerability-ddu6ytwlk) · BleepingComputer · 0 upvotes · 0 comments - [Microsoft working on Defender patch for RoguePlanet zero-day](https://daily.dev/posts/microsoft-working-on-defender-patch-for-rogueplanet-zero-day-hn0khgmvw) · BleepingComputer · 0 upvotes · 0 comments - [Microsoft Defender 'RoguePlanet' zero-day grants SYSTEM privileges](https://daily.dev/posts/microsoft-defender-rogueplanet-zero-day-grants-system-privileges-ldyxflycj) · BleepingComputer · 1 upvotes · 0 comments - [Microsoft closes book on Nightmare Eclipse's RoguePlanet zero-day](https://daily.dev/posts/microsoft-closes-book-on-nightmare-eclipse-s-rogueplanet-zero-day-hrvtdvfgt) · The Register · 0 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security), [#zero-day](https://daily.dev/tags/zero-day) [View this post on daily.dev](https://daily.dev/posts/microsoft-fixes-rogueplanet-zero-day-in-defender-dm8n7bx1x) ```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 fixes RoguePlanet zero-day in Defender","url":"https://daily.dev/posts/microsoft-fixes-rogueplanet-zero-day-in-defender-dm8n7bx1x","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/microsoft-fixes-rogueplanet-zero-day-in-defender-dm8n7bx1x"},"datePublished":"2026-07-09T13:22:13.061Z","dateModified":"2026-07-09T13:22:36.095Z","description":"Microsoft has patched CVE-2026-50656 (RoguePlanet), a zero-day elevation of privilege vulnerability in Microsoft Defender that allowed attackers with standard...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/8fe9eeb967de205fd6743e2535f16178?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/8fe9eeb967de205fd6743e2535f16178?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Security Boulevard","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":"Security Boulevard","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/3613c832180040de8d85bb29f74395be","url":"https://daily.dev/sources/securityboulevard"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/microsoft-fixes-rogueplanet-zero-day-in-defender-dm8n7bx1x","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"security,zero-day","timeRequired":"PT3M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Security Boulevard","item":"https://daily.dev/sources/securityboulevard"},{"@type":"ListItem","position":3,"name":"Microsoft fixes RoguePlanet zero-day in Defender"}]} ```