Telesquare SKT LTE Router SDT-CS3B1 Unauthenticated Remote Reboot

Published 7 mo ago 2026-03-16 · modified 4 mo ago 2026-06-17 · JSON

CVSS

7.5

v3.1 · CNA

CISA KEV

not known exploited

EPSS

0.7%

percentile 55%

Public exploits

none known

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.

CISA SSVC assessment

Exploitation: Proof of concept public
Automatable: yes
Technical impact: partial
Assessed: 7 mo ago 2026-03-16

Exploit prediction (EPSS)

0.73% probability of exploitation in the next 30 days, higher than 55% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
CNA	4.0	8.7	`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`
CNA	3.1	7.5	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`
CNA	4.0	8.7	`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:X/V:X/RE:X/U:X`
CNA	3.1	7.5	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`

Affected products

Telesquare SDT-CS3B1

Classification

Weakness

CWE-306 Missing Authentication for Critical Functionality

References

zeroscience.mk /en/vulnerabilities/ZSL-2017-5444.php · third-party-advisory
cxsecurity.com /issue/WLB-2017120300 · third-party-advisory
packetstormsecurity.com /files/145555 · exploit
exploit-db.com /exploits/43401/ · exploit
exchange.xforce.ibmcloud.com /vulnerabilities/136825 · vdb-entry
vulncheck.com /advisories/telesquare-skt-lte-router-sdt-cs3b1-unauthenticated-remote-reboot · third-party-advisory

Sources

CVE List: CVE-2017-20222
NVD: CVE-2017-20222

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.

Summary