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Vulnerability record · CVE-2017-20223 · published 16 March 2026

CVE-2017-20223: Telesquare sdt-cs3b1 firmware insecure direct object reference vulnerability

Telesquare · Sdt Cs3b1 Firmware

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.

9.3 CVSS 4.0 Critical EPSS 0.52% · top 57.8% CWE-639 · Insecure direct object reference
9.3CVSS 4.0 base score
0.52%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-46422Telesquare SDT-CW3B1 router OS command injectionTelesquare SDT-CW3B1 1.1.0 contains an OS command injection flaw (CWE-78) that lets a remote attacker run arbitrary operating system commands. The vu…EPSS 94%analysed9.8CVE-2018-12526Telesquare sdt-cs3b1 firmware hard-coded credentials vulnerabilityTelesquare SDT-CS3B1 and SDT-CW3B1 devices through 1.2.0 have a default factory account. Remote attackers can obtain access to the device via TELNET …EPSS 2.3%9.3CVE-2017-20224Telesquare sdt-cs3b1 firmware unrestricted file upload vulnerabilityTelesquare SKT LTE Router SDT-CS3B1 version 1.2.0 contains an arbitrary file upload vulnerability that allows unauthenticated attackers to upload mal…EPSS 1.0%8.7CVE-2017-20222Telesquare sdt-cs3b1 firmware missing authentication for critical function vulnerabilityTelesquare SKT LTE Router SDT-CS3B1 software version 1.2.0 contains an unauthenticated remote reboot vulnerability that allows attackers to trigger d…EPSS 0.71%5.3CVE-2017-20221Telesquare sdt-cs3b1 firmware cross-site request forgery vulnerabilityTelesquare SKT LTE Router SDT-CS3B1 version 1.2.0 contains a cross-site request forgery vulnerability that allows authenticated attackers to execute …EPSS 0.29%8.4CVE-2026-55255Langflow IDOR in responses endpoint allows cross-user flow executionLangflow before 1.9.1 has an insecure direct object reference in the /api/v1/responses endpoint. An authenticated attacker can supply another user's …KEVEPSS 0.89%analysed

Source: NIST National Vulnerability Database (record CVE-2017-20223), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.