Telesquare SKT LTE Router SDT-CS3B1 Unauthenticated Remote Reboot
Priority HIGH 77CWE-306Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00734 54th percentileScored 2026-11-07
Public exploit Yes 3 exploit referencesTagged by NVD and the CNA
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Telesquare | SDT-CS3B1 | 1.2.0 | — | No fix listed | CNA |
- SDT-CS3B1 VendorTelesquare Affected 1.2.0 Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:telesquare:sdt-cs3b1_firmware:1.2.0:*:*:*:*:*:*:* | 1.2.0 | Vulnerable | Telesquare |
| cpe:2.3:h:telesquare:sdt-cs3b1:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Telesquare |
- cpe:2.3:o:telesquare:sdt-cs3b1_firmware:1.2.0:*:*:*:*:*:*:* Versions 1.2.0 Vulnerable ·Telesquare
- cpe:2.3:h:telesquare:sdt-cs3b1:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Telesquare
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2017-20222
- 2026-10-03 Alias added: GHSA-fgv6-prj5-5cx3
References
More Telesquare Sdt-cs3b1 Firmware vulnerabilities
- TI-2021-21224 Telesquare SDT-CW3B1 1.1.0 is affected by an OS command injection vulnerability that… CVSS 3.1CRITICAL 9.8
- TI-2017-14290 Telesquare SKT LTE Router SDT-CS3B1 WebDAV Arbitrary File Upload CVSS 4.0CRITICAL 9.3
- TI-2017-14289 Telesquare SKT LTE Router SDT-CS3B1 Insecure Direct Object Reference CVSS 4.0CRITICAL 9.3
- TI-2017-14287 Telesquare SKT LTE Router SDT-CS3B1 CSRF System Command Execution CVSS 4.0MEDIUM 5.3
- TI-2018-08987 Telesquare SDT-CS3B1 and SDT-CW3B1 devices through 1.2.0 have a default factory account. CVSS 3.0CRITICAL 9.8
Sources
- CVE-2017-20222 · CVE Program
- CVE-2017-20222 · NVD
- FIRST EPSS
- GHSA-fgv6-prj5-5cx3 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences