--- title: Microsoft Patch Tuesday: January 2026 | daily.dev description: Microsoft's January 2026 Patch Tuesday addresses 112 vulnerabilities, with four critical issues highlighted: three remote code execution vulnerabilities in... canonical: https://daily.dev/posts/microsoft-patch-tuesday-january-2026-mnagczczm twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Microsoft Patch Tuesday: January 2026 | daily.dev og:description: Microsoft's January 2026 Patch Tuesday addresses 112 vulnerabilities, with four critical issues highlighted: three remote code execution vulnerabilities in... og:url: https://daily.dev/posts/microsoft-patch-tuesday-january-2026-mnagczczm og:image: https://api.daily.dev/og/posts/MNAgcZCzM.png og:image:alt: Microsoft Patch Tuesday: January 2026 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 Patch Tuesday: January 2026 **[Arctic Wolf](https://daily.dev/sources/arcticwolf)** · 2 min read · 0 upvotes · 0 comments ## Summary Microsoft's January 2026 Patch Tuesday addresses 112 vulnerabilities, with four critical issues highlighted: three remote code execution vulnerabilities in Microsoft Office and Word (CVE-2026-20953, CVE-2026-20944, CVE-2026-20805) involving use-after-free and out-of-bounds read flaws requiring victim interaction, and one Desktop Window Manager information disclosure vulnerability that could expose sensitive memory addresses. Organizations should upgrade to the latest fixed versions following their standard patching procedures. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [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 --- Tags: [#security](https://daily.dev/tags/security), [#microsoft](https://daily.dev/tags/microsoft), [#windows](https://daily.dev/tags/windows), [#vulnerability](https://daily.dev/tags/vulnerability) [View this post on daily.dev](https://daily.dev/posts/microsoft-patch-tuesday-january-2026-mnagczczm) ```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 Patch Tuesday: January 2026","url":"https://daily.dev/posts/microsoft-patch-tuesday-january-2026-mnagczczm","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/microsoft-patch-tuesday-january-2026-mnagczczm"},"datePublished":"2026-01-13T21:51:02.705Z","dateModified":"2026-02-28T04:00:45.044Z","description":"Microsoft's January 2026 Patch Tuesday addresses 112 vulnerabilities, with four critical issues highlighted: three remote code execution vulnerabilities in...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/e5395c40c69d8935559f3da4954b2a0f?_a=AQAEulh","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/e5395c40c69d8935559f3da4954b2a0f?_a=AQAEulh","isAccessibleForFree":true,"articleSection":"Arctic Wolf","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":"Arctic Wolf","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/30920b37616d4d80ad2b810a4b9f6b2e","url":"https://daily.dev/sources/arcticwolf"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/microsoft-patch-tuesday-january-2026-mnagczczm","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"security,microsoft,windows,vulnerability","timeRequired":"PT2M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Arctic Wolf","item":"https://daily.dev/sources/arcticwolf"},{"@type":"ListItem","position":3,"name":"Microsoft Patch Tuesday: January 2026"}]} ```