CVE-2026-50057 Zimbra Collaboration Suite - Privilege Escalation

Zimbra Collaboration Suite (ZCS) 10.1.16 and 10.1.21 contain a local privilege escalation caused by insecure sudo policy allowing the zimbra user to execute arbitrary commands as root via Postfix administration commands, exploit requires local command execution as zimbra on an MTA node.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.17% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Privilege Escalation
Impact
Privilege Escalation
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
23 October 2026
Updated
25 October 2026
Weakness
CWE-732

Vendor fix

Update to a version later than 10.1.21 or apply vendor patches addressing sudo policy and Postfix configuration restrictions.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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