--- title: Critical Zimbra security update fixes 9 vulnerabilities description: Zimbra Collaboration Suite version 10.1.20 patches nine security vulnerabilities, including a critical command injection flaw in the SNMP monitoring component,... canonical: https://daily.dev/posts/critical-zimbra-security-update-fixes-9-vulnerabilities-9ezatfhm8 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Critical Zimbra security update fixes 9 vulnerabilities | daily.dev og:description: Zimbra Collaboration Suite version 10.1.20 patches nine security vulnerabilities, including a critical command injection flaw in the SNMP monitoring component,... og:url: https://daily.dev/posts/critical-zimbra-security-update-fixes-9-vulnerabilities-9ezatfhm8 og:image: https://api.daily.dev/og/posts/9EZATFHM8.png og:image:alt: Critical Zimbra security update fixes 9 vulnerabilities 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. # Critical Zimbra security update fixes 9 vulnerabilities **[CSO Online](https://daily.dev/sources/csoonline)** · 3 min read · 0 upvotes · 0 comments ## Summary Zimbra Collaboration Suite version 10.1.20 patches nine security vulnerabilities, including a critical command injection flaw in the SNMP monitoring component, four XSS vulnerabilities in the Classic Web Client, an email forwarding restriction bypass, an SSRF in the Nextcloud integration, and access control issues. Zimbra is a frequent target of state-sponsored APT groups including Russian actors Fancy Bear, Cozy Bear, and Winter Vivern, who have historically weaponized Zimbra flaws quickly after disclosure. Admins are urged to upgrade immediately. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Zimbra urges customers to patch critical web client XSS flaw](https://daily.dev/posts/zimbra-urges-customers-to-patch-critical-web-client-xss-flaw-ecfk9jpn7) · BleepingComputer · 0 upvotes · 0 comments - [Over 10,000 Zimbra servers vulnerable to ongoing XSS attacks](https://daily.dev/posts/over-10-000-zimbra-servers-vulnerable-to-ongoing-xss-attacks-f0dcy8pcn) · BleepingComputer · 0 upvotes · 0 comments - [Protecting Against Zero-Click Attacks](https://daily.dev/posts/protecting-against-zero-click-attacks-ge7fvclrn) · IT Security Guru · 0 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security) [View this post on daily.dev](https://daily.dev/posts/critical-zimbra-security-update-fixes-9-vulnerabilities-9ezatfhm8) ```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":"Critical Zimbra security update fixes 9 vulnerabilities","url":"https://daily.dev/posts/critical-zimbra-security-update-fixes-9-vulnerabilities-9ezatfhm8","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/critical-zimbra-security-update-fixes-9-vulnerabilities-9ezatfhm8"},"datePublished":"2026-07-22T20:28:22.634Z","dateModified":"2026-08-24T08:22:28.458Z","description":"Zimbra Collaboration Suite version 10.1.20 patches nine security vulnerabilities, including a critical command injection flaw in the SNMP monitoring component,...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/4d4178b0f0ff8116100344a0169b5a8b?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/4d4178b0f0ff8116100344a0169b5a8b?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"CSO Online","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":"CSO Online","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/98667e4b5cac46cf9c470819c6cf71cd","url":"https://daily.dev/sources/csoonline"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/critical-zimbra-security-update-fixes-9-vulnerabilities-9ezatfhm8","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":"CSO Online","item":"https://daily.dev/sources/csoonline"},{"@type":"ListItem","position":3,"name":"Critical Zimbra security update fixes 9 vulnerabilities"}]} ```