# Zimbra-Collaboration-Suite vulnerabilities Source: https://junglewise.ai/threats/technologies/collaboration Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/collaboration.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 37 vulnerabilities in Zimbra-Collaboration-Suite: 0 in the last 7 days and 20 in the last 90 days, 4 of them critical and 1 exploited in the wild. The most recent, CVE-2026-93640, was published on 23 October 2026. 17 vulnerabilities in the last four weeks, up 750% on the four before (2). 0 critical against 2. ## Counts - Last 7 days: 0 - Last 30 days: 17 - Last 90 days: 20 - All time: 37 (4 critical, 1 exploited in the wild) ## About Zimbra-Collaboration-Suite Zimbra Collaboration is an open-source messaging and collaboration platform that includes email, calendaring, and file sharing capabilities. ## Latest Zimbra-Collaboration-Suite vulnerabilities - [CVE-2026-93640: Zimbra Collaboration Suite local privilege escalation in dnscache](https://junglewise.ai/threats/cve-2026-93640-a-local-privilege-escalation-vulnerability-in-the-optional) (high, CVSS 7.8, published 23 Oct 2026) - [CVE-2026-93639: Zimbra Collaboration Suite authorization bypass in Zimlet configuration](https://junglewise.ai/threats/cve-2026-93639-a-missing-authorization-vulnerability-in-zimbra-collaboration) (high, CVSS 8.7, published 23 Oct 2026) - [CVE-2026-93638: Zimbra Collaboration Suite reflected cross-site scripting in login](https://junglewise.ai/threats/cve-2026-93638-a-reflected-cross-site-scripting-vulnerability-in-the-login-page) (medium, CVSS 6.1, published 23 Oct 2026) - [CVE-2026-93636: Zimbra Collaboration Suite LDAP filter injection](https://junglewise.ai/threats/cve-2026-93636-an-ldap-filter-injection-vulnerability-in-zimbra-collaboration) (medium, CVSS 4.3, published 23 Oct 2026) - [CVE-2026-93634: Zimbra Collaboration Suite cross-account authorization bypass in FileSharedWithMeRequest](https://junglewise.ai/threats/cve-2026-93634-a-cross-account-authorization-vulnerability-in-zimbra) (medium, CVSS 4.3, published 23 Oct 2026) - [CVE-2026-93633: Zimbra Collaboration Suite CSS sanitization bypass](https://junglewise.ai/threats/cve-2026-93633-a-css-sanitization-vulnerability-in-zimbra-collaboration-suite) (medium, CVSS 5.4, published 23 Oct 2026) - [CVE-2026-93630: Zimbra Collaboration Suite hostname canonicalization in email sanitizer](https://junglewise.ai/threats/cve-2026-93630-a-hostname-canonicalization-vulnerability-in-the-email-html) (medium, CVSS 4.3, published 23 Oct 2026) - [CVE-2026-93629: Zimbra Collaboration Suite organizer authentication bypass in calendar invitations](https://junglewise.ai/threats/cve-2026-93629-an-organizer-authentication-vulnerability-in-zimbra-collaboration) (medium, CVSS 5.3, published 23 Oct 2026) - [CVE-2026-93628: Zimbra Collaboration Suite attendee authentication bypass in calendar processing](https://junglewise.ai/threats/cve-2026-93628-an-attendee-authentication-vulnerability-in-the-email-calendar) (medium, CVSS 5.3, published 23 Oct 2026) - [CVE-2026-93627: Zimbra Collaboration Suite organizer authentication bypass in calendar processing](https://junglewise.ai/threats/cve-2026-93627-an-organizer-authentication-vulnerability-in-the-email-calendar) (medium, CVSS 5.3, published 23 Oct 2026) - [CVE-2026-50057: Zimbra Collaboration Suite MTA local privilege escalation](https://junglewise.ai/threats/cve-2026-50057-a-local-privilege-escalation-vulnerability-in-the-zimbra) (high, CVSS 7.8, published 23 Oct 2026) - [CVE-2026-50056: Zimbra Collaboration Suite privilege escalation in zmmailboxdmgr](https://junglewise.ai/threats/cve-2026-50056-a-local-privilege-escalation-vulnerability-in-the-zmmailboxdmgr) (high, CVSS 7.8, published 23 Oct 2026) - [CVE-2026-50053: Zimbra Collaboration Suite request attribute override](https://junglewise.ai/threats/cve-2026-50053-a-request-attribute-override-vulnerability-in-zimbra) (high, CVSS 8.7, published 23 Oct 2026) - [CVE-2026-115786: Zimbra Collaboration Suite mailbox quota depletion](https://junglewise.ai/threats/cve-2026-115786-a-mailbox-quota-accounting-vulnerability-in-zimbra-collaboration) (medium, CVSS 6.5, published 23 Oct 2026) - [CVE-2026-115785: Zimbra Collaboration Suite SMTP command injection](https://junglewise.ai/threats/cve-2026-115785-an-smtp-command-injection-vulnerability-in-the-data-source) (medium, CVSS 4.3, published 23 Oct 2026) - [CVE-2026-10632: Zimbra Collaboration Suite reflected XSS in Classic Web Client](https://junglewise.ai/threats/cve-2026-10632-a-reflected-cross-site-scripting-vulnerability-in-the-classic-web) (high, CVSS 8.7, published 23 Oct 2026) - [CVE-2026-93635: Zimbra Collaboration Suite LDAP filter injection](https://junglewise.ai/threats/cve-2026-93635-ldap-filter-injection-in-zimbra-collaboration-suite-10-1-0) (medium, CVSS 5.3, published 14 Oct 2026) - [CVE-2026-93642: Zimbra Collaboration stored XSS in share notifications](https://junglewise.ai/threats/cve-2026-93642-an-unauthenticated-sender-can-forge-a-share-notification-that) (critical, CVSS 9.3, published 25 Sep 2026) - [CVE-2026-93641: Zimbra Collaboration stored XSS in share notifications](https://junglewise.ai/threats/cve-2026-93641-an-unauthenticated-sender-can-forge-a-share-notification-that) (critical, CVSS 9.3, published 25 Sep 2026) - [CVE-2026-73570: Zimbra Collaboration Suite OS command injection in SMTP](https://junglewise.ai/threats/cve-2026-73570-zimbra-collaboration-suite-os-command-injection-in-smtp) (critical, exploited in the wild, CVSS 9.8, published 21 Aug 2026) - [CVE-2025-67809: An issue was discovered in Zimbra Collaboration (ZCS) 10.0 and 10.1. A hardcoded Flickr API key and secret are present…](https://junglewise.ai/threats/cve-2025-67809-an-issue-was-discovered-in-zimbra-collaboration-zcs-10-0-and-10-1) (medium, CVSS 4.7, published 15 Dec 2025) - [CVE-2016-4019: Zimbra Collaboration Suite integrity vulnerability via unknown vectors](https://junglewise.ai/threats/cve-2016-4019-zimbra-collaboration-suite-integrity-vulnerability-via-unknown) (high, CVSS 7.5, published 18 Jan 2017) - [CVE-2016-3999: Zimbra Collaboration multiple XSS vulnerabilities](https://junglewise.ai/threats/cve-2016-3999-zimbra-collaboration-multiple-xss-vulnerabilities) (medium, CVSS 6.1, published 18 Jan 2017) - [CVE-2016-3415: Zimbra Collaboration deserialization attack via unspecified vectors](https://junglewise.ai/threats/cve-2016-3415-zimbra-collaboration-deserialization-attack-via-unspecified) (critical, CVSS 9.1, published 18 Jan 2017) - [CVE-2016-3414: Zimbra Collaboration denial of service in mailboxd](https://junglewise.ai/threats/cve-2016-3414-zimbra-collaboration-denial-of-service-in-mailboxd) (medium, CVSS 6.5, published 18 Jan 2017) ## Most severe Zimbra-Collaboration-Suite vulnerabilities - [CVE-2026-73570: Zimbra Collaboration Suite OS command injection in SMTP](https://junglewise.ai/threats/cve-2026-73570-zimbra-collaboration-suite-os-command-injection-in-smtp) (critical, exploited in the wild, CVSS 9.8, published 21 Aug 2026) - [CVE-2026-93642: Zimbra Collaboration stored XSS in share notifications](https://junglewise.ai/threats/cve-2026-93642-an-unauthenticated-sender-can-forge-a-share-notification-that) (critical, CVSS 9.3, published 25 Sep 2026) - [CVE-2026-93641: Zimbra Collaboration stored XSS in share notifications](https://junglewise.ai/threats/cve-2026-93641-an-unauthenticated-sender-can-forge-a-share-notification-that) (critical, CVSS 9.3, published 25 Sep 2026) - [CVE-2016-3415: Zimbra Collaboration deserialization attack via unspecified vectors](https://junglewise.ai/threats/cve-2016-3415-zimbra-collaboration-deserialization-attack-via-unspecified) (critical, CVSS 9.1, published 18 Jan 2017) - [CVE-2016-3406: Zimbra Collaboration CSRF in Client uploader and REST handlers](https://junglewise.ai/threats/cve-2016-3406-zimbra-collaboration-csrf-in-client-uploader-and-rest-handlers) (high, CVSS 8.8, published 18 Jan 2017) - [CVE-2026-93639: Zimbra Collaboration Suite authorization bypass in Zimlet configuration](https://junglewise.ai/threats/cve-2026-93639-a-missing-authorization-vulnerability-in-zimbra-collaboration) (high, CVSS 8.7, published 23 Oct 2026) - [CVE-2026-50053: Zimbra Collaboration Suite request attribute override](https://junglewise.ai/threats/cve-2026-50053-a-request-attribute-override-vulnerability-in-zimbra) (high, CVSS 8.7, published 23 Oct 2026) - [CVE-2026-10632: Zimbra Collaboration Suite reflected XSS in Classic Web Client](https://junglewise.ai/threats/cve-2026-10632-a-reflected-cross-site-scripting-vulnerability-in-the-classic-web) (high, CVSS 8.7, published 23 Oct 2026) - [CVE-2026-93640: Zimbra Collaboration Suite local privilege escalation in dnscache](https://junglewise.ai/threats/cve-2026-93640-a-local-privilege-escalation-vulnerability-in-the-optional) (high, CVSS 7.8, published 23 Oct 2026) - [CVE-2026-50057: Zimbra Collaboration Suite MTA local privilege escalation](https://junglewise.ai/threats/cve-2026-50057-a-local-privilege-escalation-vulnerability-in-the-zimbra) (high, CVSS 7.8, published 23 Oct 2026) ## Vulnerabilities per week 17 vulnerabilities in the last four weeks, up 750% on the four before (2). 0 critical against 2. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 1 | 1 | 1 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 2 | 2 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 1 | 0 | 0 | | 19 Oct 2026 | 16 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Zimbra-Collaboration-Suite vulnerabilities", https://junglewise.ai/threats/technologies/collaboration, 9 November 2026.