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CVE-2023-39780 — On ASUS RT-AX55 3.0.0.4.386.51598 devices, authenticated attackers can perform OS command…

Key facts

CVE-2023-39780 is a High (8.8) vulnerability: On ASUS RT-AX55 3.0.0.4.386.51598 devices, authenticated attackers can perform OS command…. This entry ships a detection-only PoC and a Docker test lab. It is on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2025-06-02), confirming active exploitation in the wild.

Actively exploited — on the CISA KEV catalog

CVE-2023-39780 is listed on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2025-06-02), confirming exploitation in the wild. Federal remediation deadline: 2025-06-23. Prioritise patching and deploy the detection and prevention rules below.
CVE CVE-2023-39780
Severity High (8.8)
CISA KEV Actively exploited (added 2025-06-02)
Detection / prevention —
PoC poc.py
Source 2023/CVE-2023-39780/

Details

English | 한국어

Description

On ASUS RT-AX55 3.0.0.4.386.51598 devices, authenticated attackers can perform OS command injection via the /start_apply.htm qos_bw_rulelist parameter. NOTE: for the similar "token-generated module" issue, see CVE-2023-41345; for the similar "token-refresh module" issue, see CVE-2023-41346; for the similar "check token module" issue, see CVE-2023-41347; and for the similar "code-authentication module" issue, see CVE-2023-41348.

Vulnerability Details

Property Value
CVE ID CVE-2023-39780
Type RCE
CVSS Score 8.8

Proof of Concept

Download

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2023/CVE-2023-39780/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-2023-39780

# 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://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/1/EN.md
  • https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/2/EN.md
  • https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/3/EN.md
  • https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/4/EN.md
  • https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/5/EN.md
  • https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/6/EN.md
  • https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/1/EN.md
  • https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/2/EN.md
  • https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/3/EN.md
  • https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/4/EN.md
  • https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/5/EN.md
  • https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/6/EN.md
  • https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-39780
  • https://www.greynoise.io/blog/stealthy-backdoor-campaign-affecting-asus-routers

Generated by PoC Generator on 2026-07-09T06:56:46.386053772

Frequently asked questions

What is CVE-2023-39780?

CVE-2023-39780 is a High (8.8) vulnerability: On ASUS RT-AX55 3.0.0.4.386.51598 devices, authenticated attackers can perform OS command…. This entry ships a detection-only PoC and a Docker test lab. It is on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2025-06-02), confirming active exploitation in the wild.

How do I detect CVE-2023-39780?

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-2023-39780?

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-2023-39780 actively exploited?

Yes. CVE-2023-39780 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, added 2025-06-02, which means it has been exploited in the wild. CISA set a federal remediation deadline of 2025-06-23. Prioritise patching and deploy the detection and prevention rules above.

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