CVE-2026-85223

Received Received - Intake

Command Injection in D-Link DNS-340L NAS Firmware

Publication date: 2026-09-03

Last updated on: 2026-09-03

Assigner: VulDB

Description

A vulnerability was found in D-Link DNS-340L 1.01B04. Affected by this issue is some unknown functionality of the file /cgi-bin/dropbox.cgi of the component CGI Handler. Performing a manipulation of the argument callback_url/sync_interval results in os command injection. The attack can be initiated remotely. The exploit has been made public and could be used.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-09-03

Last Modified

2026-09-03

Generated

2026-09-04

AI Q&A

2026-09-04

EPSS Evaluated

N/A

NVD

CVE-2026-85223

Affected Vendors & Products

Vendor	Product	Version / Range
d-link	dns-340l	1.01b04

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-77	The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
CWE-78	The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Attack-Flow Graph

Executive Summary

This vulnerability is an OS command injection flaw in D-Link DNS-340L version 1.01B04. It exists in the /cgi-bin/dropbox.cgi file due to improper handling of user input in the callback_url and sync_interval arguments. Attackers can manipulate these inputs to execute arbitrary commands on the affected system remotely.

Detection Guidance

To detect this vulnerability, check for the presence of D-Link DNS-340L firmware version 1.01B04 or earlier. Inspect network traffic for unusual commands sent to /cgi-bin/dropbox.cgi with manipulated callback_url or sync_interval parameters.

Impact Analysis

An attacker could exploit this to gain full control of the affected device, steal sensitive data, install malware, or use it as a pivot point to attack other systems on the network. The high CVSS scores indicate a severe risk of unauthorized access and system compromise.

Compliance Impact

This vulnerability could lead to unauthorized access and data breaches, violating GDPR's data protection requirements and HIPAA's security rules. Organizations using this device may face compliance violations, legal penalties, and reputational damage if exploited.

Mitigation Strategies

Immediately update the D-Link DNS-340L firmware to the latest version. Disable remote access to the device if not required. Monitor network traffic for suspicious activity targeting /cgi-bin/dropbox.cgi.

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