Auth bypass in Telesquare Sdt-Cs3b1
CVE-2017-20223
Telesquare SKT LTE Router SDT-CS3B1 firmware version 1.2.0 contains an insecure direct object reference vulnerability that allows attackers to bypass authorization and access resources by manipulating user-supplied input parameters. Attackers can directly reference objects in the system to retrieve sensitive information and access functionalities without proper access controls.
Vulnerability class: IDOR (Insecure Direct Object Reference)
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: 0.005 (42.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Telesquare Sdt-Cs3b1 — versions 1.2.0
- Telesquare Sdt-Cs3b1 Firmware — versions 1.2.0
Weakness classification (CWE)
References
- www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5445.php (Third Party Advisory, third-party-advisory)
- www.exploit-db.com/exploits/43402/ (VDB Entry, Third Party Advisory, exploit)
- packetstormsecurity.com/files/145551 (Third Party Advisory, exploit)
- cxsecurity.com/issue/WLB-2017120297 (Issue Tracking, third-party-advisory)
- exchange.xforce.ibmcloud.com/vulnerabilities/136993 (Third Party Advisory, vdb-entry)
- www.vulncheck.com/advisories/telesquare-skt-lte-router-sdt-cs3b1-insecure-direc… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2017-20223?
- CVE-2017-20223 is a critical-severity vulnerability in Telesquare Sdt-Cs3b1, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 9.8/10. Published 2026-03-16.
- How severe is CVE-2017-20223?
- Critical severity. CVSS v3 base score is 9.8 out of 10.