Auth bypass in Tinycontrol Lan Controller
CVE-2023-54327
Tinycontrol LAN Controller 1.58a contains an authentication bypass vulnerability that allows unauthenticated attackers to change admin passwords through a crafted API request. Attackers can exploit the /stm.cgi endpoint with a specially crafted authentication parameter to disable access controls and modify administrative credentials.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (51.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: -0.000
Affected products
- Tinycontrol Lan Controller — versions HW 3.8
- Tinycontrol Lan Controller — versions 3.8
- Tinycontrol Lan Controller Firmware
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/51732 (Exploit, Third Party Advisory, exploit)
- www.tinycontrol.pl (Product, product)
- www.zeroscience.mk/en/vulnerabilities/ZSL-2023-5787.php (Exploit, Third Party Advisory, third-party-advisory)
- www.vulncheck.com/advisories/tinycontrol-lan-controller-a-authentication-bypass… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2023-54327?
- CVE-2023-54327 is a critical-severity vulnerability in Tinycontrol Lan Controller, classified under Missing Authorization. CVSS score: 9.8/10. Published 2025-12-30.
- How severe is CVE-2023-54327?
- Critical severity. CVSS v3 base score is 9.8 out of 10.