CVE-2020-2509 — A command injection vulnerability has been reported to affect QTS and QuTS hero.¶

Key facts

CVE-2020-2509 is a Critical (9.8) vulnerability: A command injection vulnerability has been reported to affect QTS and QuTS hero.. This entry ships a detection-only PoC and a Docker test lab. It is on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2022-04-11), confirming active exploitation in the wild.

Actively exploited — on the CISA KEV catalog

CVE-2020-2509 is listed on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2022-04-11), confirming exploitation in the wild. Federal remediation deadline: 2022-05-02. Prioritise patching and deploy the detection and prevention rules below.


CVE	CVE-2020-2509
Severity	Critical (9.8)
CISA KEV	Actively exploited (added 2022-04-11)
Detection / prevention	—
PoC	poc.py
Source	2020/CVE-2020-2509/

Details¶

English | 한국어

Description¶

A command injection vulnerability has been reported to affect QTS and QuTS hero. If exploited, this vulnerability allows attackers to execute arbitrary commands in a compromised application. We have already fixed this vulnerability in the following versions: QTS 4.5.2.1566 Build 20210202 and later QTS 4.5.1.1495 Build 20201123 and later QTS 4.3.6.1620 Build 20210322 and later QTS 4.3.4.1632 Build 20210324 and later QTS 4.3.3.1624 Build 20210416 and later QTS 4.2.6 Build 20210327 and later QuTS hero h4.5.1.1491 build 20201119 and later

Vulnerability Details¶

Property	Value
CVE ID	CVE-2020-2509
Type	COMMAND_INJECTION
CVSS Score	9.8

Proof of Concept¶

Download¶

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2020/CVE-2020-2509/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-2020-2509

# 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¶

https://www.qnap.com/en/security-advisory/qsa-21-05
https://www.qnap.com/en/security-advisory/qsa-21-05
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-2509

Generated by PoC Generator on 2026-06-26T12:59:53.195286477

Frequently asked questions¶

What is CVE-2020-2509?¶

CVE-2020-2509 is a Critical (9.8) vulnerability: A command injection vulnerability has been reported to affect QTS and QuTS hero.. This entry ships a detection-only PoC and a Docker test lab. It is on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2022-04-11), confirming active exploitation in the wild.

How do I detect CVE-2020-2509?¶

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-2020-2509?¶

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-2020-2509 actively exploited?¶

Yes. CVE-2020-2509 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, added 2022-04-11, which means it has been exploited in the wild. CISA set a federal remediation deadline of 2022-05-02. Prioritise patching and deploy the detection and prevention rules above.

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