CVE-2026-73571

An authorization bypass vulnerability exists in Zimbra Collaboration (ZCS) before 10.1.17 due to improper authorization validation in delegated email sending functionality. An authenticated attacker can send specially crafted SOAP requests to impersonate another user and send emails without possessing the required delegation or send-as permissions. This occurs in the SaveDraftRequest SOAP handler.

CVSS v3 3.1 LOW

3.1^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.6 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://wiki.zimbra.com/wiki/Security_Center	Vendor Advisory
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories	Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

No history.

Information

Published : 2026-08-13 16:19

Updated : 2026-08-28 13:58

NVD link : CVE-2026-73571

Mitre link : CVE-2026-73571

CVE.ORG link : CVE-2026-73571

JSON object : View

Products Affected

synacor

zimbra_collaboration_suite

CWE

CWE-863

Incorrect Authorization

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