CVE-2026-107573 Progressive Robot hMailServer - Broken Access Control

Progressive Robot hMailServer 6.0.0 through 6.3.5 contains an information disclosure vulnerability caused by incorrect default permissions on installer-created files and folders, letting local authenticated users read sensitive mail server data, exploit requires local user access.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.10% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Information Disclosure, File System Read
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
8 October 2026
Updated
15 October 2026
Weakness
CWE-276

Vendor fix

Update to a version later than 6.3.5 or apply patches that correct default permissions.

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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