# CVE-2016-3405: Zimbra Collaboration multiple unspecified vulnerabilities

Source: https://junglewise.ai/threats/cve-2016-3405-zimbra-collaboration-multiple-unspecified-vulnerabilities  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2017-01-18. Updated: 2026-05-13  
License: CC BY 4.0 with a link back

CVE-2016-3405 · Severity: high · CVSS 7.5 · Published 2017-01-18

Zimbra Collaboration is a widely used enterprise email and collaboration platform. Multiple security flaws in versions prior to 8.7.0 could allow remote attackers to compromise the integrity of the system, potentially leading to unauthorized modifications of data or system configurations. Organizations using affected versions should upgrade to maintain the security of their communications and user data.

Technologies: [Synacor Zimbra Collaboration Suite](https://junglewise.ai/threats/technologies/zimbra-collaboration-suite), [Zimbra Collaboration Suite](https://junglewise.ai/threats/technologies/collaboration). Vendors: [Synacor](https://junglewise.ai/threats/vendors/synacor), [Zimbra](https://junglewise.ai/threats/vendors/zimbra).

## Quick answers

**Is CVE-2016-3405 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2016-3405 being exploited in the wild.

**How severe is CVE-2016-3405?** High severity, with a CVSS score of 7.5, published 18 January 2017.

**Which products and versions are affected?** Zimbra Collaboration Suite before 8.7.0.

**Is there a fix for CVE-2016-3405?** A patch was published on 2016-07-13: Zimbra 8.7.0 GA release date Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2016-3405 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2016-3405?** Check whether you run Synacor Zimbra Collaboration Suite or Zimbra Collaboration Suite at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This advisory covers multiple unspecified vulnerabilities (internally tracked as bugs 103961 and 104828) in Zimbra Collaboration Suite. The flaws allow remote attackers to impact system integrity via unknown vectors without requiring authentication or user interaction. The vulnerabilities were addressed in the release of Zimbra Collaboration 8.7.0. Due to the 'unspecified' nature of the report, the exact root cause (e.g., injection, logic error, or improper validation) is not publicly documented, but the CVSS metrics indicate a network-based attack vector with high integrity impact.

## Affected products

- Zimbra Zimbra Collaboration Suite before 8.7.0

## Timeline

- 2017-01-18: disclosed: NVD publication date
- 2016-07-13: patched: Zimbra 8.7.0 GA release date

## References

- [http://www.securityfocus.com/bid/95886](http://www.securityfocus.com/bid/95886)
- [https://wiki.zimbra.com/wiki/Zimbra_Releases/8.7.0](https://wiki.zimbra.com/wiki/Zimbra_Releases/8.7.0)
- [https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories](https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories)

## Related threats

- [Zimbra Collaboration Suite local privilege escalation in dnscache](https://junglewise.ai/threats/cve-2026-93640-a-local-privilege-escalation-vulnerability-in-the-optional)
- [Zimbra Collaboration Suite authorization bypass in Zimlet configuration](https://junglewise.ai/threats/cve-2026-93639-a-missing-authorization-vulnerability-in-zimbra-collaboration)
- [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)
- [Zimbra Collaboration Suite LDAP filter injection](https://junglewise.ai/threats/cve-2026-93636-an-ldap-filter-injection-vulnerability-in-zimbra-collaboration)
- [Zimbra Collaboration Suite cross-account authorization bypass in FileSharedWithMeRequest](https://junglewise.ai/threats/cve-2026-93634-a-cross-account-authorization-vulnerability-in-zimbra)