MEDIUM CVSS 6.3
Published: 2026-02-08

CVE-2026-2167

totolink wa300_firmware Security Advisory (CVE-2026-2167)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2026-2167 impacting totolink wa300_firmware. Evaluated with CVSS Base Score of 6.3 (MEDIUM).

Original NVD Description

Source: NIST NVD
A vulnerability was detected in Totolink WA300 5.2cu.7112_B20190227. The impacted element is the function setAPNetwork of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument Ipaddr results in os command injection. The attack may be performed from remote. The exploit is now public and may be used.

📊 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
Low (PR:L)
Standard user access required
User Interaction
None (UI:N)
Zero human interaction required
Scope
Unchanged (S:U)
Confined to same security context
Confidentiality
Low (C:L)
Partial information leakage
Integrity
Low (I:L)
Partial data modification possible
Availability
Low (A:L)
Partial service performance degradation

🎯 Affected Versions Matrix

Affected Product totolink / wa300_firmware
Affected Versions 5.2cu.7112_b20190227
Weakness Enumeration CWE-77

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-2026-2167 impacting totolink wa300_firmware.

⚡ Nuclei Detection Template (YAML) cve-2026-2167.yaml
id: cve-2026-2167

info:
  name: totolink wa300_firmware - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: medium
  description: |
    Automated signature & scanner for CVE-2026-2167 affecting totolink wa300_firmware.
    Evaluation: A vulnerability was detected in Totolink WA300 5.2cu.7112_B20190227. The impacted element is the function setAPNetwork of the file /cgi-bin/cstecgi.cg...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2026-2167
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
    cvss-score: 6.3
    cve-id: CVE-2026-2167
    cwe-id: CWE-77
  tags: cve,cve-2026-2167,totolink,wa300_firmware,medium

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "wa300_firmware"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2026-2167.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2026-2167
# Target: totolink wa300_firmware | CVSS: 6.3 (MEDIUM)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2026-2167 (totolink wa300_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 totolink wa300_firmware scope (5.2cu.7112_b20190227).")
        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-2026-2167.sh
# Recommended Remediation & Patching Commands for CVE-2026-2167
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install wa300_firmware 2>/dev/null || \
sudo dnf upgrade wa300_firmware 2>/dev/null || \
sudo yum update wa300_firmware

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i wa300_firmware 2>/dev/null || rpm -qa | grep -i wa300_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.

🔗 Verified Technical References

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2026-2167 in totolink wa300_firmware?

Review vendor-specific security notices and update totolink wa300_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-2026-2167?

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-2026-2167?

CVE-2026-2167 is classified with a CVSS 3.1 Base Score of 6.3 (MEDIUM). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
6.3
MEDIUM SEVERITY
CVE ID CVE-2026-2167
Weakness CWE-77
Vendor totolink
Product wa300_firmware
Published 2026-02-08
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L