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).
Attack Parameters
Attack Vector
Adjacent
Requires local network access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 5
https://cert.pl/en/posts/2026/03/CVE-2025-11500/
cvd@cert.pl
https://tinycontrol.pl/en/archives/lan-controller-35/downloads/#firmware
cvd@cert.pl
https://tinycontrol.pl/en/lk39/downloads/#firmware
cvd@cert.pl
https://tinycontrol.pl/en/lk4/downloads/#firmware
cvd@cert.pl
https://tinycontrol.pl/en/tcpdu/downloads/#firmware
cvd@cert.pl