CVE-2017-20223 | Telesquare SKT LTE Router SDT-CS3B1 firmware version 1.2.0 c… | CVSS 9.8 CRITICAL

Description

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.

Metadata

CVE ID: CVE-2017-20223
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-03-15 21:57 UTC
Published: 2026-03-16 01:28 UTC
Last updated: 2026-04-07 14:03 UTC
Primary CWE: CWE-639
Authorization Bypass Through User-Controlled Key
Vendor / Product: Telesquare / SDT-CS3B1
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Telesquare	SDT-CS3B1	—	1.2.0

Weakness (CWE)

CWE	Source	Description
CWE-639	cna	Authorization Bypass Through User-Controlled Key

CVSS scores (2)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3	CRITICAL	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References (6)

Zero Science Lab Disclosure https://www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5445.php
Exploit DB https://www.exploit-db.com/exploits/43402/
Packet Storm Security https://packetstormsecurity.com/files/145551
CXSecurity https://cxsecurity.com/issue/WLB-2017120297
IBM X-Force Exchange https://exchange.xforce.ibmcloud.com/vulnerabilities/136993
VulnCheck Advisory: Telesquare SKT LTE Router SDT-CS3B1 Insecure Direct Object Reference https://www.vulncheck.com/advisories/telesquare-skt-lte-router-sdt-cs3b1-insecure-direct-object-reference