CVE-2025-11500: tinycontrol Lan Kontroler v3.5 · Weak Encoding for Password
Affects tinycontrol Lan Kontroler v3.5Source CVE Database V5
Not known to be exploited · CVSS 8.7 High : upgrade to 1.67 soon.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 28% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 1.67, 1.75, 1.38 +1
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 16 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| tinycontrolLan Kontroler v3.5 | Affected
| Fixed in
|
| tinycontrolLK3.9 | Affected
| Fixed in
|
| tinycontrolLK4 | Affected
| Fixed in
|
| tinycontroltcPDU | Affected
| Fixed in
|
AI-suggested
Organizations should immediately verify the firmware versions of their tinycontrol Lan Kontroler devices and upgrade to the patched versions: 1.36 for tcPDU, 1.67 for LK3.5, 1.75 for LK3.9, and 1.38 for LK4. Until updates can be applied, network segmentation should be enforced to restrict access to these devices strictly to trusted management hosts. Disable or restrict HTTP access to the management interface, preferably replacing it with secure protocols such as HTTPS with strong authentication. Monitor network traffic for suspicious HTTP requests to the login page and anomalous JSON responses. Implement network access controls to prevent unauthorized devices from connecting to the local network segment hosting these controllers. Additionally, review and harden device configurations to ensure that secondary authentication mechanisms are enabled and properly configured. Regularly audit device logs and access patterns to detect potential exploitation attempts. Consider deploying intrusion detection systems tuned to detect attempts to access exposed management interfaces.
Description
Tinycontrol devices such as tcPDU and LAN Controllers LK3.5, LK3.9 and LK4 have two separate authentication mechanisms - one solely for interface management and one for protecting all other server resources. When the latter is turned off (which is a default setting), an unauthenticated attacker on the local network can obtain usernames and encoded passwords for interface management portal by inspecting the HTTP response of the server when visiting the login page, which contains a JSON file with these details. Both normal and admin users credentials are exposed. 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).
References
- cert.pl/en/posts/2026/03/CVE-2025-11500/ (opens in a new tab)
- securitum.com/CVE-2025-11500 (opens in a new tab)
- tinycontrol.pl/en/archives/lan-controller-35/downloads/ (opens in a new tab)
- tinycontrol.pl/en/lk39/downloads/ (opens in a new tab)
- tinycontrol.pl/en/lk4/downloads/ (opens in a new tab)
- tinycontrol.pl/en/tcpdu/downloads/ (opens in a new tab)