--- title: Citrix NetScaler bug may be multiple flaws in one description: Active exploitation of CVE-2026-3055, a critical 9.3-rated out-of-bounds memory read vulnerability in Citrix NetScaler, began within days of its disclosure.... canonical: https://daily.dev/posts/citrix-netscaler-bug-may-be-multiple-flaws-in-one-kggs3gauu twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Citrix NetScaler bug may be multiple flaws in one | daily.dev og:description: Active exploitation of CVE-2026-3055, a critical 9.3-rated out-of-bounds memory read vulnerability in Citrix NetScaler, began within days of its disclosure.... og:url: https://daily.dev/posts/citrix-netscaler-bug-may-be-multiple-flaws-in-one-kggs3gauu og:image: https://api.daily.dev/og/posts/Kggs3GauU.png og:image:alt: Citrix NetScaler bug may be multiple flaws in 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. # Citrix NetScaler bug may be multiple flaws in one **[The Register](https://daily.dev/sources/theregister)** · 3 min read · 0 upvotes · 0 comments ## Summary Active exploitation of CVE-2026-3055, a critical 9.3-rated out-of-bounds memory read vulnerability in Citrix NetScaler, began within days of its disclosure. Researchers at watchTowr observed reconnaissance traffic within days and confirmed active exploitation by March 27. The flaw allows attackers to leak sensitive memory contents — including session tokens and credentials — by sending a malformed request. Researchers also suggest CVE-2026-3055 may actually bundle multiple related memory leak vulnerabilities under a single ID, and they discovered an additional similar issue reported to Citrix. The UK's NCSC has urged organizations to patch immediately, as NetScaler ADC and Gateway devices are widely exposed and sit in critical identity paths. ## Full article daily.dev links to this article rather than hosting it. 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NetScaler Vulnerability Under Attack](https://daily.dev/posts/citrixbleed-ing-again-netscaler-vulnerability-under-attack-eta7e1qfc) · Dark Reading · 1 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security) [View this post on daily.dev](https://daily.dev/posts/citrix-netscaler-bug-may-be-multiple-flaws-in-one-kggs3gauu) ```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":"Citrix NetScaler bug may be multiple flaws in one","url":"https://daily.dev/posts/citrix-netscaler-bug-may-be-multiple-flaws-in-one-kggs3gauu","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/citrix-netscaler-bug-may-be-multiple-flaws-in-one-kggs3gauu"},"datePublished":"2026-03-30T13:52:23.343Z","dateModified":"2026-03-30T13:52:53.137Z","description":"Active exploitation of CVE-2026-3055, a critical 9.3-rated out-of-bounds memory read vulnerability in Citrix NetScaler, began within days of its disclosure....","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/5bfd284a04e57abbcc7c252add0511b9?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/5bfd284a04e57abbcc7c252add0511b9?_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/citrix-netscaler-bug-may-be-multiple-flaws-in-one-kggs3gauu","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"security","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":"Citrix NetScaler bug may be multiple flaws in one"}]} ```