--- title: 421 bugs in Microsoft's Patch Tuesday release, and the... description: Microsoft's August Patch Tuesday release addressed 421 bugs, with at least one vulnerability already being actively exploited by North Korean threat actors.... canonical: https://daily.dev/posts/421-bugs-in-microsoft-s-patch-tuesday-release-and-the-norks-have-already-attacked-one-uejsuezeo twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: 421 bugs in Microsoft's Patch Tuesday release, and the Norks have already attacked one | daily.dev og:description: Microsoft's August Patch Tuesday release addressed 421 bugs, with at least one vulnerability already being actively exploited by North Korean threat actors.... og:url: https://daily.dev/posts/421-bugs-in-microsoft-s-patch-tuesday-release-and-the-norks-have-already-attacked-one-uejsuezeo og:image: https://api.daily.dev/og/posts/uEjsUEzEO.png og:image:alt: 421 bugs in Microsoft's Patch Tuesday release, and the Norks have already attacked one 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. # 421 bugs in Microsoft's Patch Tuesday release, and the Norks have already attacked one **[The Register](https://daily.dev/sources/theregister)** · 3 min read · 0 upvotes · 0 comments ## Summary Microsoft's August Patch Tuesday release addressed 421 bugs, with at least one vulnerability already being actively exploited by North Korean threat actors. The scale of this release signals an increasingly demanding patching cadence for sysadmins. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How many CVEs were patched in Microsoft's August 2026 Patch Tuesday? Microsoft's August 2026 Patch Tuesday release addressed 421 bugs. At least one of those vulnerabilities was already being actively exploited by North Korean threat actors before the patch was released, making it a zero-day in the wild. _Teams managing Windows environments track Patch Tuesday disclosures like this on daily.dev to prioritize remediation._ ## Similar posts on daily.dev - [Patchpocalypse Now: Microsoft tops last month's record with 622 Patch Tuesday CVEs](https://daily.dev/posts/patchpocalypse-now-microsoft-tops-last-month-s-record-with-622-patch-tuesday-cves-xfjw8drx6) · The Register · 0 upvotes · 0 comments - [Patch Tuesday, May 2026 Edition – Krebs on Security](https://daily.dev/posts/patch-tuesday-may-2026-edition-krebs-on-security-mp4rjfele) · Krebs on Security · 0 upvotes · 0 comments - [June 2026 Microsoft Patch Tuesday](https://daily.dev/posts/june-2026-microsoft-patch-tuesday-soc9er861) · Tenable Blog · 0 upvotes · 0 comments - [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: [#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/421-bugs-in-microsoft-s-patch-tuesday-release-and-the-norks-have-already-attacked-one-uejsuezeo) ```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":"421 bugs in Microsoft's Patch Tuesday release, and the Norks have already attacked one","url":"https://daily.dev/posts/421-bugs-in-microsoft-s-patch-tuesday-release-and-the-norks-have-already-attacked-one-uejsuezeo","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/421-bugs-in-microsoft-s-patch-tuesday-release-and-the-norks-have-already-attacked-one-uejsuezeo"},"datePublished":"2026-08-11T21:35:11.782Z","dateModified":"2026-08-12T00:51:01.571Z","description":"Microsoft's August Patch Tuesday release addressed 421 bugs, with at least one vulnerability already being actively exploited by North Korean threat actors....","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/b39f6423a818791e0fa5fb08f777c4eb?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/b39f6423a818791e0fa5fb08f777c4eb?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"The Register","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":"The Register","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/66aa2113fdad463992ffcbf0e8963fda","url":"https://daily.dev/sources/theregister"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/421-bugs-in-microsoft-s-patch-tuesday-release-and-the-norks-have-already-attacked-one-uejsuezeo","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"microsoft,windows,vulnerability,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":"The Register","item":"https://daily.dev/sources/theregister"},{"@type":"ListItem","position":3,"name":"421 bugs in Microsoft's Patch Tuesday release, and the Norks have already attacked one"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/421-bugs-in-microsoft-s-patch-tuesday-release-and-the-norks-have-already-attacked-one-uejsuezeo#faq","mainEntity":[{"@type":"Question","name":"How many CVEs were patched in Microsoft's August 2026 Patch Tuesday?","acceptedAnswer":{"@type":"Answer","text":"Microsoft's August 2026 Patch Tuesday release addressed 421 bugs. At least one of those vulnerabilities was already being actively exploited by North Korean threat actors before the patch was released, making it a zero-day in the wild. Teams managing Windows environments track Patch Tuesday disclosures like this on daily.dev to prioritize remediation."}}]} ```