CVE-2026-33371

An issue was discovered in Zimbra Collaboration (ZCS) 10.0 and 10.1

Medium · published March 20, 2026

CVSS v3.1
4.3
EPSS
0%
Percentile
34.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00409 · 34.0th percentile
Published
2026-03-20T00:00Z
EPSS history
Timeline
  • 20 MAR 00:00Z
    An issue was discovered in Zimbra Collaboration (ZCS) 10.0 and 10.1
    cvelistv5