Vendor
Zimbra vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 40 vulnerabilities in Zimbra: 0 in the last 7 days and 23 in the last 90 days, 6 of them critical and 1 exploited in the wild. The most recent, CVE-2026-93640, was published on 23 October 2026. 18 vulnerabilities in the last four weeks, up 350% on the four before (4). 0 critical against 4. 1 technology has a page of its own.
- Last 7 days
- 0
- Last 90 days
- 23
- Critical, all time
- 6
- Exploited in the wild
- 1
About Zimbra
Email and collaboration server software providing messaging, calendar, and contact management services.
Zimbra technologies
Latest Zimbra vulnerabilities
- CVE-2026-93640: Zimbra Collaboration Suite local privilege escalation in dnscachehighCVSS 7.8
- CVE-2026-93639: Zimbra Collaboration Suite authorization bypass in Zimlet configurationhighCVSS 8.7
- CVE-2026-93638: Zimbra Collaboration Suite reflected cross-site scripting in loginmediumCVSS 6.1
- CVE-2026-93636: Zimbra Collaboration Suite LDAP filter injectionmediumCVSS 4.3
- CVE-2026-93634: Zimbra Collaboration Suite cross-account authorization bypass in FileSharedWithMeRequestmediumCVSS 4.3
- CVE-2026-93633: Zimbra Collaboration Suite CSS sanitization bypassmediumCVSS 5.4
- CVE-2026-93631: Zimbra Collaboration Suite OAuth CSRF in external account linkinghighCVSS 7.1
- CVE-2026-93630: Zimbra Collaboration Suite hostname canonicalization in email sanitizermediumCVSS 4.3
- CVE-2026-93629: Zimbra Collaboration Suite organizer authentication bypass in calendar invitationsmediumCVSS 5.3
- CVE-2026-93628: Zimbra Collaboration Suite attendee authentication bypass in calendar processingmediumCVSS 5.3
- CVE-2026-93627: Zimbra Collaboration Suite organizer authentication bypass in calendar processingmediumCVSS 5.3
- CVE-2026-50057: Zimbra Collaboration Suite MTA local privilege escalationhighCVSS 7.8
- CVE-2026-50056: Zimbra Collaboration Suite privilege escalation in zmmailboxdmgrhighCVSS 7.8
- CVE-2026-50053: Zimbra Collaboration Suite request attribute overridehighCVSS 8.7
- CVE-2026-115786: Zimbra Collaboration Suite mailbox quota depletionmediumCVSS 6.5
- CVE-2026-115785: Zimbra Collaboration Suite SMTP command injectionmediumCVSS 4.3
- CVE-2026-10632: Zimbra Collaboration Suite reflected XSS in Classic Web ClienthighCVSS 8.7
- CVE-2026-93635: Zimbra Collaboration Suite LDAP filter injectionmediumCVSS 5.3EPSS 0.2%
- CVE-2026-93647: Zimbra Collaboration stored XSS in calendar COUNTER message From addresscriticalCVSS 9.3
- CVE-2026-93643: Zimbra OnlyOffice path traversal and code executioncriticalCVSS 9.8
- CVE-2026-93642: Zimbra Collaboration stored XSS in share notificationscriticalCVSS 9.3
- CVE-2026-93641: Zimbra Collaboration stored XSS in share notificationscriticalCVSS 9.3
- CVE-2026-73570: Zimbra Collaboration Suite OS command injection in SMTPcriticalexploited in the wildCVSS 9.8EPSS 11.7%
- 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…mediumCVSS 4.7EPSS 0.3%
- CVE-2016-4019: Zimbra Collaboration Suite integrity vulnerability via unknown vectorshighCVSS 7.5
Most severe Zimbra vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-73570: Zimbra Collaboration Suite OS command injection in SMTPcriticalexploited in the wildCVSS 9.8EPSS 11.7%
- CVE-2026-93643: Zimbra OnlyOffice path traversal and code executioncriticalCVSS 9.8
- CVE-2026-93647: Zimbra Collaboration stored XSS in calendar COUNTER message From addresscriticalCVSS 9.3
- CVE-2026-93642: Zimbra Collaboration stored XSS in share notificationscriticalCVSS 9.3
- CVE-2026-93641: Zimbra Collaboration stored XSS in share notificationscriticalCVSS 9.3
- CVE-2016-3415: Zimbra Collaboration deserialization attack via unspecified vectorscriticalCVSS 9.1
- CVE-2016-3406: Zimbra Collaboration CSRF in Client uploader and REST handlershighCVSS 8.8
- CVE-2026-93639: Zimbra Collaboration Suite authorization bypass in Zimlet configurationhighCVSS 8.7
- CVE-2026-50053: Zimbra Collaboration Suite request attribute overridehighCVSS 8.7
- CVE-2026-10632: Zimbra Collaboration Suite reflected XSS in Classic Web ClienthighCVSS 8.7
Vulnerabilities per week
18 vulnerabilities in the last four weeks, up 350% on the four before (4). 0 critical against 4. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 1 | 1 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 4 | 4 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 1 | 0 | |
| 19 Oct 2026 | 17 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many Zimbra vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/vendors/zimbra)<a href="https://junglewise.ai/threats/vendors/zimbra"><img src="https://junglewise.ai/threats/vendors/zimbra/badge.svg" alt="Zimbra vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/vendors/zimbra.json, and this page as text at https://junglewise.ai/threats/vendors/zimbra.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Zimbra vulnerabilities", https://junglewise.ai/threats/vendors/zimbra, 9 November 2026.