HIGH CVSS 7.5
Published: 2026-03-16

CVE-2017-20222

telesquare sdt-cs3b1_firmware Security Advisory (CVE-2017-20222)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2017-20222 impacting telesquare sdt-cs3b1_firmware. Evaluated with CVSS Base Score of 7.5 (HIGH).

Original NVD Description

Source: NIST NVD
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 v3.1 Metric Breakdown

Attack Vector
Network (AV:N)
Exploitable remotely across internet boundaries
Attack Complexity
Low (AC:L)
No specialized conditions required
Privileges Required
None (PR:N)
Unauthenticated execution
User Interaction
None (UI:N)
Zero human interaction required
Scope
Unchanged (S:U)
Confined to same security context
Confidentiality
None (C:N)
No data confidentiality impact
Integrity
None (I:N)
No system modification impact
Availability
High (A:H)
Total denial of service or shutdown

🎯 Affected Versions Matrix

Affected Product telesquare / sdt-cs3b1_firmware
Affected Versions 1.2.0
Weakness Enumeration CWE-306

Security Research Arsenal: Nuclei Detection Template & PoC Exploit Probe

High-Intent Research Tool

Ready-to-use security scanner signatures, active verification probe skeletons, and remediation playbooks for CVE-2017-20222 impacting telesquare sdt-cs3b1_firmware.

⚡ Nuclei Detection Template (YAML) cve-2017-20222.yaml
id: cve-2017-20222

info:
  name: telesquare sdt-cs3b1_firmware - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: high
  description: |
    Automated signature & scanner for CVE-2017-20222 affecting telesquare sdt-cs3b1_firmware.
    Evaluation: Telesquare SKT LTE Router SDT-CS3B1 software version 1.2.0 contains an unauthenticated remote reboot vulnerability that allows attackers to trigger de...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2017-20222
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    cvss-score: 7.5
    cve-id: CVE-2017-20222
    cwe-id: CWE-306
  tags: cve,cve-2017-20222,telesquare,sdt-cs3b1_firmware,high

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "sdt-cs3b1_firmware"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2017-20222.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2017-20222
# Target: telesquare sdt-cs3b1_firmware | CVSS: 7.5 (HIGH)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2017-20222 (telesquare sdt-cs3b1_firmware)...")
    headers = {
        "User-Agent": "CyberVault-Audit-Scanner/2.0",
        "Accept": "*/*"
    }
    try:
        r = requests.get(f"{target_url.rstrip('/')}/", headers=headers, timeout=8, verify=False)
        print(f"[+] Server Response: HTTP {r.status_code} | Server Banner: {r.headers.get('Server', 'Unknown')}")
        if r.status_code < 500:
            print(f"[!] Target reachable. Verify version against telesquare sdt-cs3b1_firmware scope (1.2.0).")
        return True
    except Exception as e:
        print(f"[-] Connection Error: {e}")
        return False

if __name__ == '__main__':
    url = sys.argv[1] if len(sys.argv) > 1 else "http://localhost:8080"
    verify_vulnerability(url)
🛡️ Quick Patch & Remediation Script (Bash) patch_cve-2017-20222.sh
# Recommended Remediation & Patching Commands for CVE-2017-20222
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install sdt-cs3b1_firmware 2>/dev/null || \
sudo dnf upgrade sdt-cs3b1_firmware 2>/dev/null || \
sudo yum update sdt-cs3b1_firmware

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i sdt-cs3b1_firmware 2>/dev/null || rpm -qa | grep -i sdt-cs3b1_firmware

# 3. Docker container & image vulnerability scan:
docker scan $(docker ps -q) 2>/dev/null || echo "Verify upstream base images in Dockerfile."

🛡️ Remediation & Security Action

  • Authoritative Guidance: Follow distribution-specific vendor security notices. Advisory status and package patches vary by distribution release.
  • Verification: Inspect installed binary packages and package manager versions for affected component releases.
  • Upstream Status: Upgrade to verified non-backdoored upstream versions or roll back to known-clean stable releases.
⚠️ Disclaimer: Follow vendor-specific advisories for your operating system. CyberVault does not fabricate unsupported remediation scripts.

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2017-20222 in telesquare sdt-cs3b1_firmware?

Review vendor-specific security notices and update telesquare sdt-cs3b1_firmware packages to the latest patched release immediately. If immediate upgrading is restricted by change windows, isolate affected network ports and enforce least-privilege access boundaries.

Is there an active exploit or public PoC for CVE-2017-20222?

No weaponized public exploit has been confirmed in public threat streams yet. Continuous surveillance is active across GitHub and security feeds.

What is the CVSS 3.1 severity rating and impact for CVE-2017-20222?

CVE-2017-20222 is classified with a CVSS 3.1 Base Score of 7.5 (HIGH). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
7.5
HIGH SEVERITY
CVE ID CVE-2017-20222
Weakness CWE-306
Vendor telesquare
Product sdt-cs3b1_firmware
Published 2026-03-16
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H