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).
CVE-2025-11500
HIGHNVD 8.78.7—
EchelonGraph scoreMEDIUM confidence
This high-severity CVE scores 8.7 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 66% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.7
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.7Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.7
- EG Score
- 8.7(medium)
- EPSS
- 19.3%
- KEV
- Not listed
Published
March 16, 2026
Last Modified
May 19, 2026
Advisory Details (5)
Auto-updated May 19, 2026No patch confirmed yet.
generic
Downloads | LK4 - universal IoT controller | tinycontrol
https://tinycontrol.pl/en/lk4/downloads/#firmwaregeneric
Downloads | Lan Controller v3.5 | tinycontrol
https://tinycontrol.pl/en/archives/lan-controller-35/downloads/#firmwaregeneric
Vulnerabilities in multiple tinycontrol devices | CERT Polska
https://cert.pl/en/posts/2026/03/CVE-2025-11500/Frequently asked(5)
What is CVE-2025-11500?
CVE-2025-11500 is a high vulnerability published on March 16, 2026. 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…
When was CVE-2025-11500 disclosed?
CVE-2025-11500 was first published in the National Vulnerability Database on March 16, 2026, with the most recent update on May 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-11500 actively exploited?
CVE-2025-11500 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-11500?
CVE-2025-11500 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2025-11500?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-11500, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2025-11500
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