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Vulnerability record · CVE-2017-20222 · published 16 March 2026

CVE-2017-20222: Telesquare sdt-cs3b1 firmware missing authentication for critical function vulnerability

Telesquare · Sdt Cs3b1 Firmware

Telesquare SKT LTE Router SDT-CS3B1 software version 1.2.0 contains an unauthenticated remote reboot vulnerability that allows attackers to trigger device reboot without authentication. Attackers can send POST requests to the lte.cgi endpoint with the Command=Reboot parameter to cause denial of service by forcing the router to restart.

8.7 CVSS 4.0 High EPSS 0.71% · top 48.5% CWE-306 · Missing authentication for critical function
8.7CVSS 4.0 base score
0.71%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

Telesquare SKT LTE Router SDT-CS3B1 software version 1.2.0 contains an unauthenticated remote reboot vulnerability that allows attackers to trigger device reboot without authentication. Attackers can send POST requests to the lte.cgi endpoint with the Command=Reboot parameter to cause denial of service by forcing the router to restart.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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-2017120300 ExploitIssue Tracking
https://exchange.xforce.ibmcloud.com/vulnerabilities/136825 Third Party Advisory
https://packetstormsecurity.com/files/145555 ExploitThird Party Advisory
https://www.exploit-db.com/exploits/43401/ ExploitThird Party AdvisoryVDB Entry
https://www.vulncheck.com/advisories/telesquare-skt-lte-router-sdt-cs3b1-unauthenticated-remote-reboot Third Party Advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5444.php ExploitThird 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-2017-20223Telesquare sdt-cs3b1 firmware insecure direct object reference vulnerabilityTelesquare SKT LTE Router SDT-CS3B1 firmware version 1.2.0 contains an insecure direct object reference vulnerability that allows attackers to bypass…EPSS 0.52%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%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%8.8CVE-2026-67277MikroTik RouterOS btest missing authentication leaks kernel memory and crashes kernelRouterOS accepts a "related" btest connection before the primary session is authenticated, letting an unauthenticated client start an IPv4 UDP test. …KEVEPSS 1.6%analysed8.8CVE-2026-59822LiteLLM MCP endpoint auth bypass via OAuth2 passthrough fallbackLiteLLM's MCP Streamable HTTP endpoint, prior to 1.84.0, let an unauthenticated attacker send a fabricated Authorization header that triggered an OAu…KEVEPSS 0.84%analysed9.3CVE-2026-72529TrueConf Server missing authentication allows remote script executionTrueConf Server versions 5.3.X through 5.3.9, 5.4.X through 5.4.9, 5.5.X through 5.5.5, and earlier expose an undocumented function on port 4307/TCP …KEVEPSS 1.5%analysed

Source: NIST National Vulnerability Database (record CVE-2017-20222), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.