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.

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. Attack…

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.000 (7.6th percentile) — read the EPSS interpretation.

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.

Affected products

Telesquare Sdt-cs3b1 — versions 1.2.0

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

Zero Science Lab Disclosure (third-party-advisory)
Exploit DB (exploit)
Packet Storm Security (exploit)
CXSecurity (third-party-advisory)
IBM X-Force Exchange (vdb-entry)
VulnCheck Advisory: Telesquare SKT LTE Router SDT-CS3B1 Insecure Direct Object Reference (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.