CVE-2026-50054

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.

CVSS 3.1

7.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 6% of CVEs (scores of 2026-10-25)

CWE

CWE-269

Published

2026-10-08

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

References

• https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories

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