An authorization flaw in Zimbra Collaboration Suite’s GrantRightsRequest allows an attacker with access to an authenticated account to grant another local account the loginAs right, creating persistent mailbox access and mail-sending authority that survives password changes and session expiry.

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Fixes

Solution

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Workaround

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History

Thu, 08 Oct 2026 18:45:00 +0000

Type Values Removed Values Added
First Time appeared Zimbra
Zimbra zimbra Collaboration Suite
Vendors & Products Zimbra
Zimbra zimbra Collaboration Suite

Thu, 08 Oct 2026 16:45:00 +0000

Type Values Removed Values Added
Description An authorization flaw in Zimbra Collaboration Suite’s GrantRightsRequest allows an attacker with access to an authenticated account to grant another local account the loginAs right, creating persistent mailbox access and mail-sending authority that survives password changes and session expiry.
Title Zimbra Collaboration Suite GrantRightsRequest SOAP Handler Allows Self-Granting of Undocumented loginAs Mailbox Delegation Right
Weaknesses CWE-269
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: rapid7

Published:

Updated: 2026-10-08T19:10:47.375Z

Reserved: 2026-06-03T09:35:31.591Z

Link: CVE-2026-50054

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-08T17:17:17.180

Modified: 2026-10-08T20:49:23.240

Link: CVE-2026-50054

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-08T18:30:07Z

Weaknesses