CVE-2026-82928: Undocumented access path in mH-DEVELOPER

Severity: high (CVSS 7.7 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-28 · updated 2026-09-28
Weakness: CWE-1242

Description

mH-DEVELOPER smart home module contains a hardcoded SSH public key in /root/.ssh/authorized_keys, serving as a potential backdoor. The SSH daemon allows root login via key authentication and starts automatically. An attacker with the matching private key can gain a root shell on any affected device, resulting in full system compromise. The key cannot be removed without remounting the file system and survives a factory reset. Vendor notes that this functionality was used only for service purposes. This issue was fixed in version 3.0.30

Affected products

F&F Filipowski mH-DEVELOPER: before 3.0.30 — fixed in 3.0.30

How to fix

Upgrade to a fixed version: F&F Filipowski mH-DEVELOPER 3.0.30. Check the vendor advisory for mitigations.

References

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