Vulnerability record · CVE-2017-20224 · published 16 March 2026

CVE-2017-20224: Telesquare sdt-cs3b1 firmware unrestricted file upload vulnerability

Telesquare · Sdt Cs3b1 Firmware

Telesquare SKT LTE Router SDT-CS3B1 version 1.2.0 contains an arbitrary file upload vulnerability that allows unauthenticated attackers to upload malicious content by exploiting enabled WebDAV HTTP methods. Attackers can use PUT, DELETE, MKCOL, MOVE, COPY, and PROPPATCH methods to upload executable code, delete files, or manipulate server content for remote code execution or denial of service.

9.3 CVSS 4.0 Critical EPSS 1.0% · top 37.5% CWE-434 · Unrestricted file upload

9.3CVSS 4.0 base score

1.0%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

3References, 2 tagged exploit

17 Jun 2026Last modified by NVD

Description

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.

Sdt Cs3b1 Firmware Telesquare

References

Link	Tags
https://cxsecurity.com/issue/WLB-2017120301	ExploitIssue Tracking
https://www.vulncheck.com/advisories/telesquare-skt-lte-router-sdt-cs3b1-webdav-arbitrary-file-upload	Third Party Advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5446.php	ExploitThird Party Advisory

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2017-20224), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.