CVE-2026-107571 Progressive Robot hMailServer - Privilege Escalation

Progressive Robot hMailServer 6.0.0 through 6.3.6 contains a privilege escalation caused by incorrect default permissions in the installer folder inheritance, letting local authenticated users execute code as high-privileged mail server accounts, exploit requires installation in a writable parent folder.

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

Details

Type
Privilege Escalation
Impact
Remote Code Execution, Privilege Escalation
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
19 October 2026
Updated
20 October 2026
Weakness
CWE-276

Vendor fix

Update to a version later than 6.3.6 or ensure installation in default Program Files directory with correct 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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