VDB-398422 · Submit #894213 · CVE-2026-85223

D-Link DNS-340L 1.01B04 CGI /cgi-bin/dropbox.cgi callback_url/sync_interval os command injection

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
9.0	$0-$5k	2.29+

Summaryinfo

A vulnerability labeled as very critical has been found in D-Link DNS-340L 1.01B04. This affects an unknown part of the file /cgi-bin/dropbox.cgi of the component CGI Handler. Executing a manipulation of the argument callback_url/sync_interval can lead to os command injection. This vulnerability is tracked as CVE-2026-85223. The attack can be launched remotely. Moreover, an exploit is present.

Detailsinfo

A vulnerability classified as very critical was found in D-Link DNS-340L 1.01B04. This vulnerability affects an unknown part of the file /cgi-bin/dropbox.cgi of the component CGI Handler. The manipulation of the argument callback_url/sync_interval with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is available at github.com. This vulnerability was named CVE-2026-85223. The exploitation appears to be easy. The attack can be initiated remotely. Technical details and also a public exploit are known. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/03/2026). This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

It is possible to download the exploit at github.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

D-Link

Name

DNS-340L

Version

1.01B04

License

commercial

Website

Vendor: https://www.dlink.com/

CPE 2.3info

🔒

CPE 2.2info

🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.0

VulDB Base Score: 9.9
VulDB Temp Score: 9.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Os command injection
CWE: CWE-78 / CWE-77 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

09/03/2026 Advisory disclosed
09/03/2026 +0 days VulDB entry created
09/03/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: dlink.com

Advisory: github.com
Status: Not defined

CVE: CVE-2026-85223 (🔒)
GCVE (CVE): GCVE-0-2026-85223
GCVE (VulDB): GCVE-100-398422
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/03/2026 16:29
Changes: 09/03/2026 16:29 (56)
Complete: 🔍
Submitter: ST4R0001
Cache ID: 216::103

Submitinfo

Accepted

Submit #894213: D-Link DNS-340L ShareCenter confirmed DNS-340L firmware builds OS Command Injection (by ST4R0001)