CVE-2017-20223

Name: CVE-2017-20223
Creator: NVD / NIST
Published: 2026-03-16T14:17:52.347+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.3/10EPSS 0.52%

Last modified Jun 17, 2026

CVE-2017-20223 is a critical-severity vulnerability rated 9.3/10 on the CVSS scale. 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.. EPSS estimates a 0.52% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

CVSS 4.0

9.3/10

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:X/V:X/RE:X/U:X

EPSS Probability

0.52%

40.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-639

Affected Software

Vendor	Product	Versions
Telesquare	Sdt-Cs3b1 Firmware	1.2.0

References

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

Timeline

Published: Mar 16, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2017-20223?

How severe is CVE-2017-20223?

CVE-2017-20223 has a CVSS score of 9.3/10 (CRITICAL severity). The EPSS model estimates a 0.52% probability of exploitation in the next 30 days.

How do I fix CVE-2017-20223?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-20223?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST