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…

PriorityP415low3.1CVSS 3.1

AVNACHPRLUINSUCNILAN

EPSS

0.17%

6.3th percentile

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.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
zimbra	collaboration	< 10.1.17	10.1.17

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