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CVE-2026-33371

MEDIUM

4.3

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.

CVE Details

CVSS v3.1 Score4.3

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published3/20/2026

Last Modified4/1/2026

Sourcenvd

Honeypot Sightings0

Affected Products

synacor:zimbra_collaboration_suite

Weaknesses (CWE)

CWE-611

References

https://wiki.zimbra.com/wiki/Security_Center(cve@mitre.org)

https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.16#Security_Fixes(cve@mitre.org)

https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy(cve@mitre.org)

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories(cve@mitre.org)

IOC Correlations

No correlations recorded

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