D-Link DIR-823X 250416 /goform/set_language langSelection os command injection

Summaryinfo

A vulnerability classified as critical has been found in D-Link DIR-823X 250416. Affected is an unknown function of the file /goform/set_language. The manipulation of the argument langSelection leads to os command injection. This vulnerability is documented as CVE-2026-2084. The attack can be initiated remotely. Additionally, an exploit exists.

Detailsinfo

A vulnerability was found in D-Link DIR-823X 250416 and classified as critical. This issue affects some unknown processing of the file /goform/set_language. The manipulation of the argument langSelection with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-2084. The exploitation is known to be easy. The attack may be initiated remotely. The exploitation needs additional levels of successful authentication. Technical details as well as a public exploit are known. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/09/2026). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

The exploit is available 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.

The vulnerability is also documented in the databases at EUVD (EUVD-2026-5729) and CERT Bund (WID-SEC-2026-0340). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • D-LINK Router

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 6.8

VulDB Base Score: 7.2
VulDB Temp Score: 6.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.2
CNA Vector: 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

02/06/2026 Advisory disclosed
02/06/2026 +0 days VulDB entry created
02/09/2026 +3 days VulDB entry last update

Sourcesinfo

Vendor: dlink.com

Advisory: github.com
Status: Not defined

CVE: CVE-2026-2084 (🔒)
GCVE (CVE): GCVE-0-2026-2084
GCVE (VulDB): GCVE-100-344651
EUVD: 🔒
CERT Bund: WID-SEC-2026-0340 - D-LINK DIR-823X und DWR-M921 Router: Mehrere Schwachstellen ermöglichen Ausführen von beliebigem Programmcode mit Administratorrechten

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 02/06/2026 09:20
Updated: 02/09/2026 15:47
Changes: 02/06/2026 09:20 (56), 02/07/2026 17:01 (31), 02/08/2026 10:23 (1), 02/09/2026 15:47 (7)
Complete: 🔍
Submitter: 942384053
Cache ID: 216::103

Submitinfo

Accepted

Duplicate

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

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