CVE-2017-20221

Name: CVE-2017-20221
Creator: NVD / NIST
Published: 2026-03-16T14:17:51.913+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.29%

Last modified Jun 17, 2026

CVE-2017-20221 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Telesquare SKT LTE Router SDT-CS3B1 version 1.2.0 contains a cross-site request forgery vulnerability that allows authenticated attackers to execute arbitrary system commands by exploiting missing request validation. Attackers can craft malicious web pages that perform administrative actions when visited by logged-in users, enabling command execution with router privileges.. EPSS estimates a 0.29% chance of exploitation in the next 30 days.

Description

Telesquare SKT LTE Router SDT-CS3B1 version 1.2.0 contains a cross-site request forgery vulnerability that allows authenticated attackers to execute arbitrary system commands by exploiting missing request validation. Attackers can craft malicious web pages that perform administrative actions when visited by logged-in users, enabling command execution with router privileges.

Metrics

CVSS 3.1

3.5/10

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

CVSS 4.0

5.3/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L/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

0.29%

20.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-352

Affected Software

Vendor	Product	Versions
Telesquare	Sdt-Cs3b1 Firmware	1.2.0

References

https://cxsecurity.com/issue/WLB-2017120299Issue Tracking
https://exchange.xforce.ibmcloud.com/vulnerabilities/136839Third Party Advisory
https://packetstormsecurity.com/files/145550Exploit, Third Party Advisory
https://www.exploit-db.com/exploits/43400/Exploit, VDB Entry
https://www.vulncheck.com/advisories/telesquare-skt-lte-router-sdt-cs3b1-csrf-system-command-executionThird Party Advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5443.phpExploit, Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2017-20221?

How severe is CVE-2017-20221?

CVE-2017-20221 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.

How do I fix CVE-2017-20221?

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-2017-20221?

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

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Source: NVD / NIST