Critical 9.8Published Mar 15, 2026

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

Updated under an hour ago (Oct 26, 2026, 1:00 AM ET)

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It affects Telesquare SDT-CS3B1 and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Telesquare SDT-CS3B1

Exploited in the last 30 days

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: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-639
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Analyzed
Record last updated: Apr 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Telesquare SDT-CS3B1 telesquare:sdt_cs3b1 (from the name)	1.2.0	CNA record
telesquare sdt-cs3b1_firmware telesquare:sdt-cs3b1_firmware	1.2.0	NVD

References

https://www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5445.phpthird-party-advisory
https://www.exploit-db.com/exploits/43402/exploit, third-party-advisory, vdb-entry
https://packetstormsecurity.com/files/145551exploit, third-party-advisory
https://cxsecurity.com/issue/WLB-2017120297third-party-advisory, issue-tracking
https://exchange.xforce.ibmcloud.com/vulnerabilities/136993vdb-entry, third-party-advisory
https://www.vulncheck.com/advisories/telesquare-skt-lte-router-sdt-cs3b1-insecure-direct-object-referencethird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.