CVE-2026-114490 Progressive Robot hMailServer - Broken Access Control

Progressive Robot hMailServer 6.3.4 through 6.3.6 contains an authorization bypass caused by improper permission checks in the COM administration API, letting accounts with serveradmin role act as whole-server administrators, exploit requires serveradmin role with domain list.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Privilege Escalation, Data Tampering, Information Disclosure
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
21 October 2026
Updated
22 October 2026
Weakness
CWE-863

Vendor fix

Update to a version later than 6.3.6 or apply vendor patches addressing authorization checks.

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

← All CVEs