Description
Tinycontrol devices such as tcPDU and LAN Controllers LK3.5, LK3.9 and LK4 allow a low privileged user to read an administrator's password by directly accessing a specific resource inaccessible via a graphical interface.
This issue has been fixed in firmware versions: 1.36 (for tcPDU), 1.67 (for LK3.5 - hardware versions: 3.5, 3.6, 3.7 and 3.8), 1.75 (for LK3.9 - hardware version 3.9) and 1.38 (for LK4 - hardware version 4.0).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| tinycontrol | Lan Kontroler v3.5 | < 1.67 | 1.67 |
| tinycontrol | LK3.9 | < 1.75 | 1.75 |
| tinycontrol | LK4 | < 1.38 | 1.38 |
| tinycontrol | tcPDU | < 1.36 | 1.36 |
References
- https://cert.pl/en/posts/2026/03/CVE-2025-11500/ third-party-advisory
- https://tinycontrol.pl/en/archives/lan-controller-35/downloads/#firmware release-notes
- https://tinycontrol.pl/en/lk39/downloads/#firmware release-notes
- https://tinycontrol.pl/en/lk4/downloads/#firmware release-notes
- https://tinycontrol.pl/en/tcpdu/downloads/#firmware release-notes