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NVD Vulnerability Details :
CVE-2026-33371
Analyzed
More InfoOfficial Page
Source-cve@mitre.org
View Known Exploited Vulnerability (KEV) details
Published At-20 Mar, 2026 | 14:16
Updated At-01 Apr, 2026 | 15:35

An issue was discovered in Zimbra Collaboration (ZCS) 10.0 and 10.1. An XML External Entity (XXE) vulnerability exists in the Zimbra Exchange Web Services (EWS) SOAP interface due to improper handling of XML input. An authenticated attacker can submit crafted XML data that is processed by an XML parser with external entity resolution enabled. Successful exploitation may allow disclosure of sensitive local files from the server.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.14.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Type: Secondary
Version: 3.1
Base score: 4.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CPE Matches
Synacor, Inc.
synacor
>>zimbra_collaboration_suite>>Versions from 10.0.0(inclusive) to 10.1.16(exclusive)
cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-611Secondary134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE ID: CWE-611
Type: Secondary
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://wiki.zimbra.com/wiki/Security_Centercve@mitre.org
Vendor Advisory
Release Notes
https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.16#Security_Fixescve@mitre.org
Release Notes
https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policycve@mitre.org
Product
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisoriescve@mitre.org
Vendor Advisory
Hyperlink: https://wiki.zimbra.com/wiki/Security_Center
Source: cve@mitre.org
Resource:
Vendor Advisory
Release Notes
Hyperlink: https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.16#Security_Fixes
Source: cve@mitre.org
Resource:
Release Notes
Hyperlink: https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy
Source: cve@mitre.org
Resource:
Product
Hyperlink: https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
Source: cve@mitre.org
Resource:
Vendor Advisory
Change History
0Changes found
Details not found