HOMEVULNERABILITIESCVE-2016-3406
HIGH

CVE-2016-3406

CWE-352Published: January 18, 2017· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official Description

Multiple cross-site request forgery (CSRF) vulnerabilities in Zimbra Collaboration before 8.7.0 allow remote attackers to hijack the authentication of unspecified victims via vectors involving (1) the Client uploader extension or (2) extension REST handlers, aka bugs 104294 and 104456.

NVD Source

Technical Analysis

CVE-2016-3406 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors & Products

synacor1 product(s)
zimbra collaboration suite
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://bugzilla.zimbra.com/show_bug.cgi?id=104294
ADVISORYhttps://bugzilla.zimbra.com/show_bug.cgi?id=104456
ADVISORYhttps://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
ADVISORYhttps://bugzilla.zimbra.com/show_bug.cgi?id=104294
ADVISORYhttps://bugzilla.zimbra.com/show_bug.cgi?id=104456
ADVISORYhttps://wiki.zimbra.com/wiki/Zimbra_Security_Advisories

All References (10)

→
http://www.securityfocus.com/bid/95890
→
https://bugzilla.zimbra.com/show_bug.cgi?id=104294Issue Tracking · Third Party Advisory
→
https://bugzilla.zimbra.com/show_bug.cgi?id=104456Issue Tracking · Third Party Advisory
→
https://wiki.zimbra.com/wiki/Zimbra_Releases/8.7.0Release Notes
→
https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory
→
http://www.securityfocus.com/bid/95890
→
https://bugzilla.zimbra.com/show_bug.cgi?id=104294Issue Tracking · Third Party Advisory
→
https://bugzilla.zimbra.com/show_bug.cgi?id=104456Issue Tracking · Third Party Advisory
→
https://wiki.zimbra.com/wiki/Zimbra_Releases/8.7.0Release Notes
→
https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory

Quick Facts

CVE IDCVE-2016-3406
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-352
CISA KEVNo
Affected1 vendor(s)
PublishedJan 18, 2017

Related CVEs (CWE-352)

CVE-2025-32642
10.0
CVE-2017-5145
10.0
CVE-2025-23922
10.0
CVE-2024-47634
9.8
CVE-2022-44739
9.8
CVE-2019-14551
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2016-3406 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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