CVE-2026-114489 Progressive Robot hMailServer - Broken Access Control

Progressive Robot hMailServer 6.0.0 through 6.3.6 contains an authorization bypass in REST and COM administration APIs, letting remote authenticated users with confined credentials modify mail routing and domain configurations beyond their domains, exploit requires authenticated user with confined domain credentials.

CVSS base score 8.1 /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
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Published
21 October 2026
Updated
22 October 2026
Weakness
CWE-862

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

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