UNKNOWN CVSS 4.3
Published: 2011-04-13

CVE-2011-0746

zyxel o2_dsl_router_classic Security Advisory (CVE-2011-0746)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2011-0746 impacting zyxel o2_dsl_router_classic. Evaluated with CVSS Base Score of 4.3 (UNKNOWN).

Original NVD Description

Source: NIST NVD
Cross-site request forgery (CSRF) vulnerability in Forms/PortForwarding_Edit_1 on the ZyXEL O2 DSL Router Classic allows remote attackers to hijack the authentication of administrators for requests that insert cross-site scripting (XSS) sequences via the PortRule_Name parameter.

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Network (AV:N)
Exploitable remotely across internet boundaries
Confidentiality
None (C:N)
No data confidentiality impact
Availability
None (A:N)
No system availability impact

🎯 Affected Versions Matrix

Affected Product zyxel / o2_dsl_router_classic
Affected Versions *
Weakness Enumeration CWE-352

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-2011-0746 impacting zyxel o2_dsl_router_classic.

⚡ Nuclei Detection Template (YAML) cve-2011-0746.yaml
id: cve-2011-0746

info:
  name: zyxel o2_dsl_router_classic - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: unknown
  description: |
    Automated signature & scanner for CVE-2011-0746 affecting zyxel o2_dsl_router_classic.
    Evaluation: Cross-site request forgery (CSRF) vulnerability in Forms/PortForwarding_Edit_1 on the ZyXEL O2 DSL Router Classic allows remote attackers to hijack th...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2011-0746
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:M/Au:N/C:N/I:P/A:N
    cvss-score: 4.3
    cve-id: CVE-2011-0746
    cwe-id: CWE-352
  tags: cve,cve-2011-0746,zyxel,o2_dsl_router_classic,unknown

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "o2_dsl_router_classic"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2011-0746.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2011-0746
# Target: zyxel o2_dsl_router_classic | CVSS: 4.3 (UNKNOWN)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2011-0746 (zyxel o2_dsl_router_classic)...")
    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 zyxel o2_dsl_router_classic scope (*).")
        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-2011-0746.sh
# Recommended Remediation & Patching Commands for CVE-2011-0746
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install o2_dsl_router_classic 2>/dev/null || \
sudo dnf upgrade o2_dsl_router_classic 2>/dev/null || \
sudo yum update o2_dsl_router_classic

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i o2_dsl_router_classic 2>/dev/null || rpm -qa | grep -i o2_dsl_router_classic

# 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-2011-0746 in zyxel o2_dsl_router_classic?

Review vendor-specific security notices and update zyxel o2_dsl_router_classic 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-2011-0746?

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-2011-0746?

CVE-2011-0746 is classified with a CVSS 3.1 Base Score of 4.3 (UNKNOWN). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
4.3
UNKNOWN SEVERITY
CVE ID CVE-2011-0746
Weakness CWE-352
Vendor zyxel
Product o2_dsl_router_classic
Published 2011-04-13
Vector AV:N/AC:M/Au:N/C:N/I:P/A:N