CVE-2023-53739: Tinycontrol LAN Controller v3 LK3 1.58a Unauthenticated Configuration Backup Disclosure

Severity: critical (CVSS 9.9 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-12-09 · updated 2026-06-17
Weakness: CWE-260

Description

Tinycontrol LAN Controller v3 LK3 version 1.58a contains an unauthenticated vulnerability that allows remote attackers to download configuration backup files containing sensitive credentials. Attackers can retrieve the lk3_settings.bin file and extract base64-encoded user and admin passwords without authentication.

Affected products

Tinycontrol LK: through 1.58a; HW 3.8
Tinycontrol LAN Controller v: through 1.58a; HW 3.8

References

https://www.exploit-db.com/exploits/51731
https://www.tinycontrol.pl
https://www.vulncheck.com/advisories/tinycontrol-lan-controller-v3-lk3-unauthenticated-configuration-backup-disclosure
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2023-5786.php

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