CVE-2026-82929: Use of Shared Cryptographic Key in mH-DEVELOPER

Severity: medium (CVSS 6.3 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-321

Description

mH-DEVELOPER smart home module uses the same hard-coded SSH host keys on every device, with no per-device key generation. An attacker who extracts these keys from the firmware can set up a rogue SSH server that clients will trust without warning, enabling man-in-the-middle attacks and credential interception. 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

https://cert.pl/posts/2026/09/CVE-2026-82928/
https://www.fif.com.pl/pl/strona-glowna/1367-mh-developer.html

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