Medium severity4.3NVD Advisory· Published Mar 20, 2026· Updated Apr 1, 2026
CVE-2026-33371
CVE-2026-33371
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.
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Affected products
2- cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*Range: >=10.0.0,<10.1.16
- Range: 10.0, 10.1
Patches
Vulnerability mechanics
References
4- wiki.zimbra.com/wiki/Security_CenternvdVendor AdvisoryRelease Notes
- wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesnvdVendor Advisory
- wiki.zimbra.com/wiki/Zimbra_Releases/10.1.16nvdRelease Notes
- wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_PolicynvdProduct
News mentions
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