[ CVE-2026-50054 · Published 8 Oct 2026 ]
Vulnerability in Zimbra Collaboration Suite
CVSS 7.1
EPSS <1%No fix listed yet
[ Description ]Official 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.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.