What’s Vulnerable › Vulnerabilities

CVE-2017-20223: Telesquare SKT LTE Router SDT-CS3B1 Insecure Direct Object Reference

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-16 · updated 2026-06-17
• Weakness: CWE-639

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.

Affected products

• Telesquare SDT-CS3B1: 1.2.0

References

• https://cxsecurity.com/issue/WLB-2017120297
• https://exchange.xforce.ibmcloud.com/vulnerabilities/136993
• https://packetstormsecurity.com/files/145551
• https://www.exploit-db.com/exploits/43402/
• https://www.vulncheck.com/advisories/telesquare-skt-lte-router-sdt-cs3b1-insecure-direct-object-reference
• https://www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5445.php

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