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CVE-2018-4063 — An exploitable remote code execution vulnerability exists in the upload.cgi functionality…

Key facts

CVE-2018-4063 is a High (8.8) vulnerability: An exploitable remote code execution vulnerability exists in the upload.cgi functionality…. This entry ships a detection-only PoC and a Docker test lab. It is on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2025-12-12), confirming active exploitation in the wild.

Actively exploited — on the CISA KEV catalog

CVE-2018-4063 is listed on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2025-12-12), confirming exploitation in the wild. Federal remediation deadline: 2026-01-02. Prioritise patching and deploy the detection and prevention rules below.
CVE CVE-2018-4063
Severity High (8.8)
CISA KEV Actively exploited (added 2025-12-12)
Detection / prevention —
PoC poc.py
Source 2018/CVE-2018-4063/

Details

English | 한국어

Description

An exploitable remote code execution vulnerability exists in the upload.cgi functionality of Sierra Wireless AirLink ES450 FW 4.9.3. A specially crafted HTTP request can upload a file, resulting in executable code being uploaded, and routable, to the webserver. An attacker can make an authenticated HTTP request to trigger this vulnerability.

Vulnerability Details

Property Value
CVE ID CVE-2018-4063
Type RCE
CVSS Score 8.8

Proof of Concept

Download

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2018/CVE-2018-4063/poc.py

Usage

# Run PoC against target
python3 poc.py --target <TARGET_URL>

# With authentication
python3 poc.py --target <TARGET_URL> --username <USER> --password <PASS>

⚠️ Warning: This PoC is for authorized security testing only. It uses detection-only techniques and does not exploit or damage target systems.

Test Lab

This repository includes a Docker-based test environment with both vulnerable and patched applications.

Quick Start

# Clone and navigate to CVE directory
cd CVE-2018-4063

# Start both applications
docker-compose up -d

# Run tests
./run-tests.sh    # Linux/Mac
./run-tests.ps1   # Windows PowerShell

Application Endpoints

Application URL Status
Vulnerable App http://localhost:8080 Shows vulnerability
Patched App http://localhost:8081 Demonstrates fix

Directory Structure

├── README.md           # English documentation
├── README_KO.md        # Korean documentation
├── poc.py              # PoC detection script
├── docker-compose.yml  # Container orchestration
├── run-tests.sh        # Linux/Mac test runner
├── run-tests.ps1       # Windows test runner
├── vulnerable-app/     # Vulnerable version
│   ├── app.py
│   ├── Dockerfile
│   └── requirements.txt
└── patched-app/        # Fixed version
    ├── app.py
    ├── Dockerfile
    └── requirements.txt

References

  • http://packetstormsecurity.com/files/152648/Sierra-Wireless-AirLink-ES450-ACEManager-upload.cgi-Remote-Code-Execution.html
  • http://www.securityfocus.com/bid/108147
  • https://ics-cert.us-cert.gov/advisories/ICSA-19-122-03
  • https://talosintelligence.com/vulnerability_reports/TALOS-2018-0748
  • http://packetstormsecurity.com/files/152648/Sierra-Wireless-AirLink-ES450-ACEManager-upload.cgi-Remote-Code-Execution.html
  • http://www.securityfocus.com/bid/108147
  • https://ics-cert.us-cert.gov/advisories/ICSA-19-122-03
  • https://talosintelligence.com/vulnerability_reports/TALOS-2018-0748
  • https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-4063
  • https://www.forescout.com/blog/ot-network-security-threats-industrial-routers-under-attack/

Generated by PoC Generator on 2026-07-10T11:15:06.64705819

Frequently asked questions

What is CVE-2018-4063?

CVE-2018-4063 is a High (8.8) vulnerability: An exploitable remote code execution vulnerability exists in the upload.cgi functionality…. This entry ships a detection-only PoC and a Docker test lab. It is on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2025-12-12), confirming active exploitation in the wild.

How do I detect CVE-2018-4063?

Run the detection-only PoC included with this entry against your Docker test lab to confirm whether a target is affected; pair it with your own IDS logging.

How do I block or mitigate CVE-2018-4063?

Upgrade to a fixed version per the vendor advisory; the NVD record lists the affected versions. Use the included PoC to verify your remediation.

Is CVE-2018-4063 actively exploited?

Yes. CVE-2018-4063 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, added 2025-12-12, which means it has been exploited in the wild. CISA set a federal remediation deadline of 2026-01-02. Prioritise patching and deploy the detection and prevention rules above.

For authorized security testing and research only. See the full source and NVD record.