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VULNERABILITIES

CVE-2026-33371 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:4.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://wiki.zimbra.com/wiki/Security_Center [email protected]Release NotesVendor Advisory
https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.16#Security_Fixes [email protected]Release Notes
https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy [email protected]Product
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-611Improper Restriction of XML External Entity ReferenceCISA-ADP

Affected Products

ProductVersions
synacor zimbra collaboration suite
>= 10.0.0, < 10.1.16

CPE

  • cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

5 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-33371
NVD Published Date:
Mar 20, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-33371 Details - Not Deferred