OS Command Injection Vulnerability in D-Link DIR-823X Router
CVE-2026-2120

8.6HIGH

Key Information:

Vendor

D-link
Status
Dir-823x
Vendor
CVE Published:
8 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2120?

A vulnerability exists in the D-Link DIR-823X router that allows remote attackers to exploit the /goform/set_server_settings functionality. By manipulating parameters such as terminal_addr, server_ip, and server_port, an attacker can perform os command injection. This security flaw enables unauthorized execution of commands on the affected device, potentially leading to a compromise of the system. Publicly available exploits increase the urgency for users to secure their devices against potential attacks.

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Affected Version(s)

DIR-823X 250416

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-2120 - Proof of Concept

References

https://vuldb.com/?id.344694
vdb-entrytechnical-description
https://vuldb.com/?ctiid.344694
signaturepermissions-required
https://vuldb.com/?submit.746916
third-party-advisory

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

942384053 (VulDB User)
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