{"id":1879,"date":"2026-08-26T00:09:00","date_gmt":"2026-08-26T00:09:00","guid":{"rendered":"https:\/\/netguide.io\/news\/2026\/08\/26\/zimbra-cve-2026-73570-snmp-actively-exploited\/"},"modified":"2026-08-26T00:19:44","modified_gmt":"2026-08-26T00:19:44","slug":"zimbra-cve-2026-73570-snmp-actively-exploited","status":"publish","type":"post","link":"https:\/\/netguide.io\/news\/en\/2026\/08\/26\/zimbra-cve-2026-73570-snmp-actively-exploited\/","title":{"rendered":"Zimbra Flaw Under Active Attack: Unauthenticated Code Execution via SNMP"},"content":{"rendered":"<div id=\"netgu-3440920088\" class=\"netgu-before-content netgu-entity-placement\"><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6258556257245998\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block;\" data-ad-client=\"ca-pub-6258556257245998\" \ndata-ad-slot=\"3494115342\" \ndata-ad-format=\"auto\"><\/ins>\n<script> \n(adsbygoogle = window.adsbygoogle || []).push({}); \n<\/script>\n<\/div>\n<p class=\"wp-block-paragraph\"><strong>Attackers are actively exploiting a critical flaw in the Zimbra Collaboration Suite: CVE-2026-73570 allows code execution without authentication. Agencies and security researchers are warning &ndash; over 270 servers are already compromised.<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Attack via SNMP<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The cause is improper input validation when processing SNMP notifications. As a result, an unauthenticated attacker can execute arbitrary operating-system commands with the privileges of the &#8220;zimbra&#8221; user. Affected are installations where the optional &#8220;zimbra-snmp&#8221; package is installed and SNMP notifications are enabled.<\/p><div id=\"netgu-1858063773\" class=\"netgu-content netgu-entity-placement\"><aside class=\"deals-top deals-top--compact\">\r\n\r\n\t\t\t<h3 class=\"deals-top__title\">Top-Deals<\/h3>\r\n\t\r\n\t\t\t<ul class=\"deals-top__list\">\r\n\t\t\t\t\t\t\t<li class=\"deals-top__item\">\r\n\t\t\t\t\t<a class=\"deals-top__link\" href=\"https:\/\/netguide.io\/deals\/de\/deals\/amazon-kindle-scribe-64-gb-neuartiges-display-mit-gleichmaessigem-rahmen-schreib-einfach-in-buecher-und-dokumente-mit-notizbuchzusammenfassung-mit-premi\/\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img class=\"deals-top__image\" src=\"https:\/\/netguide.io\/news\/wp-content\/uploads\/sites\/15\/2026\/09\/kindle_shopall_310mmTall-150x150.jpg\" alt=\"\" width=\"52\" height=\"52\" loading=\"lazy\" \/>\r\n\t\t\t\t\t\t\r\n\t\t\t\t\t\t<span class=\"deals-top__body\">\r\n\t\t\t\t\t\t\t<span class=\"deals-top__name\">Amazon Kindle Scribe (64 GB) \u2013 Neuartiges Display mit gleichm\u00e4\u00dfigem Rahmen | Schreib einfach in B\u00fccher und Dokumente | Mit Notizbuchzusammenfassung | Mit Premi\u2026<\/span>\r\n\r\n\t\t\t\t\t\t\t<span class=\"deals-top__meta\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"deals-top__price\">329.99 \u20ac<\/span>\r\n\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<s>421.02 \u20ac<\/s>\r\n\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"deals-discount\">-22%<\/span>\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\r\n\t\t\t\t\t\t<\/span>\r\n\r\n\t\t\t\t\t\t<span class=\"deals-top__temperature\">\r\n\t\t\t\t\t\t\t0\u00b0\r\n\t\t\t\t\t\t<\/span>\r\n\t\t\t\t\t<\/a>\r\n\t\t\t\t<\/li>\r\n\t\t\t\t\t\t\t<li class=\"deals-top__item\">\r\n\t\t\t\t\t<a class=\"deals-top__link\" href=\"https:\/\/netguide.io\/deals\/de\/deals\/philips-hue-white-ambiance-e27-3er-starter-set-inkl-smart-button-dimmbar-alle-weissschattierungen-steuerbar-via-app-kompatibel-mit-amazon-alexa-echo-echo\/\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img class=\"deals-top__image\" src=\"https:\/\/netguide.io\/news\/wp-content\/uploads\/sites\/15\/2026\/09\/61pZ0xD9KGL._AC_SL1500_-150x150.jpg\" alt=\"\" width=\"52\" height=\"52\" loading=\"lazy\" \/>\r\n\t\t\t\t\t\t\r\n\t\t\t\t\t\t<span class=\"deals-top__body\">\r\n\t\t\t\t\t\t\t<span class=\"deals-top__name\">Philips Hue White Ambiance E27 3er Starter Set inkl. Smart Button, dimmbar, alle Wei\u00dfschattierungen, steuerbar via App, kompatibel mit Amazon Alexa (Echo, Echo\u2026<\/span>\r\n\r\n\t\t\t\t\t\t\t<span class=\"deals-top__meta\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"deals-top__price\">77.99 \u20ac<\/span>\r\n\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<s>129.99 \u20ac<\/s>\r\n\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"deals-discount\">-40%<\/span>\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\r\n\t\t\t\t\t\t<\/span>\r\n\r\n\t\t\t\t\t\t<span class=\"deals-top__temperature\">\r\n\t\t\t\t\t\t\t0\u00b0\r\n\t\t\t\t\t\t<\/span>\r\n\t\t\t\t\t<\/a>\r\n\t\t\t\t<\/li>\r\n\t\t\t\t\t\t\t<li class=\"deals-top__item\">\r\n\t\t\t\t\t<a class=\"deals-top__link\" href=\"https:\/\/netguide.io\/deals\/de\/deals\/philips-hue-e27-filament-grosse-edison-lampe-white-ambiance-alle-weisstoene-550-lm-dimmbar-leuchtmittel-fuer-das-hue-lichtsystem-app-und-sprachsteuerung-s\/\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img class=\"deals-top__image\" src=\"https:\/\/netguide.io\/news\/wp-content\/uploads\/sites\/15\/2026\/09\/61UiXJLhChL._AC_SL1500_-150x150.jpg\" alt=\"\" width=\"52\" height=\"52\" loading=\"lazy\" \/>\r\n\t\t\t\t\t\t\r\n\t\t\t\t\t\t<span class=\"deals-top__body\">\r\n\t\t\t\t\t\t\t<span class=\"deals-top__name\">Philips Hue E27 Filament Gro\u00dfe Edison Lampe | White Ambiance, Alle Wei\u00dft\u00f6ne, 550 lm, Dimmbar, Leuchtmittel f\u00fcr das Hue Lichtsystem, App- und Sprachsteuerung, S\u2026<\/span>\r\n\r\n\t\t\t\t\t\t\t<span class=\"deals-top__meta\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"deals-top__price\">29.99 \u20ac<\/span>\r\n\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<s>39.90 \u20ac<\/s>\r\n\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"deals-discount\">-25%<\/span>\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\r\n\t\t\t\t\t\t<\/span>\r\n\r\n\t\t\t\t\t\t<span 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height=\"52\" loading=\"lazy\" \/>\r\n\t\t\t\t\t\t\r\n\t\t\t\t\t\t<span class=\"deals-top__body\">\r\n\t\t\t\t\t\t\t<span class=\"deals-top__name\">Samsung Galaxy Book4 Edge AI-Laptop, 15,6-Zoll-Display, 16GB RAM, Snapdragon X Plus Prozessor, Notebook 512GB Speicher, Copilot+ PC, Sapphire Blue, 3 Jahre Her\u2026<\/span>\r\n\r\n\t\t\t\t\t\t\t<span class=\"deals-top__meta\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"deals-top__price\">579.00 \u20ac<\/span>\r\n\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<s>967.97 \u20ac<\/s>\r\n\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"deals-discount\">-40%<\/span>\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\r\n\t\t\t\t\t\t<\/span>\r\n\r\n\t\t\t\t\t\t<span class=\"deals-top__temperature\">\r\n\t\t\t\t\t\t\t0\u00b0\r\n\t\t\t\t\t\t<\/span>\r\n\t\t\t\t\t<\/a>\r\n\t\t\t\t<\/li>\r\n\t\t\t\t\t<\/ul>\r\n\r\n\t\t\t\t\t<p class=\"deals-top__more\">\r\n\t\t\t\t<a href=\"https:\/\/netguide.io\/deals\/\">Alle Deals ansehen \u2192<\/a>\r\n\t\t\t<\/p>\r\n\t\t\t<\/aside>\r\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Patch and scale<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The flaw has been fixed since version 10.1.20, released on 20 July. The Shadowserver project found over 270 compromised Zimbra instances; more than 12,000 Zimbra mail servers are openly reachable on the internet and thus potentially exposed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Deadlines set<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">CERT Polska warned of active exploitation on 17 August, and CISA added the flaw to its KEV catalog on 21 August (deadline for US agencies: 24 August). Anyone running Zimbra should update to 10.1.20 or newer immediately.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Sources: <a href=\"https:\/\/www.bleepingcomputer.com\/news\/security\/cisa-orders-urgent-patching-of-actively-exploited-zimbra-flaw\/\" target=\"_blank\" rel=\"noopener\">BleepingComputer<\/a>, <a href=\"https:\/\/thehackernews.com\/2026\/08\/attackers-exploit-zimbra-snmp-flaw-for.html\" target=\"_blank\" rel=\"noopener\">The Hacker News<\/a>.<\/em><\/p>\n<div id=\"netgu-3354793314\" class=\"netgu-after-content netgu-entity-placement\"><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6258556257245998\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block;\" data-ad-client=\"ca-pub-6258556257245998\" \ndata-ad-slot=\"4559785002\" \ndata-ad-format=\"auto\"><\/ins>\n<script> \n(adsbygoogle = window.adsbygoogle || []).push({}); \n<\/script>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Attackers are actively exploiting Zimbra flaw CVE-2026-73570 \u2013 unauthenticated code execution via SNMP. Over 270 servers are already compromised.<\/p>\n","protected":false},"author":1,"featured_media":1722,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[],"tags":[],"class_list":["post-1879","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"brizy_media":[],"_links":{"self":[{"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/posts\/1879","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/comments?post=1879"}],"version-history":[{"count":1,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/posts\/1879\/revisions"}],"predecessor-version":[{"id":1888,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/posts\/1879\/revisions\/1888"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/media\/1722"}],"wp:attachment":[{"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/media?parent=1879"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/categories?post=1879"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/tags?post=1879"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}