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CVE-2026-82688 — A security vulnerability has been detected in D-Link DNS-340L and DNS-345…

Key facts

CVE-2026-82688 is a Critical (9.1) vulnerability: A security vulnerability has been detected in D-Link DNS-340L and DNS-345…. This entry ships a detection-only PoC and a Docker test lab.
CVE CVE-2026-82688
Severity Critical (9.1)
Detection / prevention —
PoC poc.py
Source 2026/CVE-2026-82688/

Details

English | 한국어

Description

A security vulnerability has been detected in D-Link DNS-340L and DNS-345 1.01B04/1.03B06/1.04.B02/1.05b04. This impacts an unknown function of the file /cgi-bin/virtual_vol.cgi of the component Virtual Volume Handler. The manipulation of the argument f_sharename/f_target/f_name leads to os command injection. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used.

Vulnerability Details

Property Value
CVE ID CVE-2026-82688
Type COMMAND_INJECTION
CVSS Score 9.1

Proof of Concept

Download

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-82688/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-2026-82688

# 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/dxz0069/WAVLINK-WN530H4-Command-Injection-in-set_add_routing/blob/main/DLINK-CMD-001-vulndb.md
  • https://vuldb.com/cve/CVE-2026-82688
  • https://vuldb.com/submit/894190
  • https://vuldb.com/vuln/397176
  • https://vuldb.com/vuln/397176/cti
  • https://www.dlink.com/

Generated by PoC Generator on 2026-09-03T10:50:45.412120066

Frequently asked questions

What is CVE-2026-82688?

CVE-2026-82688 is a Critical (9.1) vulnerability: A security vulnerability has been detected in D-Link DNS-340L and DNS-345…. This entry ships a detection-only PoC and a Docker test lab.

How do I detect CVE-2026-82688?

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-2026-82688?

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

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