OS Command Injection Vulnerability in D-Link DIR-823X Router
CVE-2026-2155

8.6HIGH

Key Information:

Vendor

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2155?

A security flaw has been identified in the D-Link DIR-823X router, specifically within the sub_4208A0 function of the Configuration Handler component. This vulnerability allows remote attackers to manipulate the 'dmz_host' and 'dmz_enable' parameters, leading to potential OS command injection. The exploit is publicly available, raising concerns about security for network administrators managing this device.

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-2026-2155 - Proof of Concept

References

https://vuldb.com/?id.344857
vdb-entrytechnical-description
https://vuldb.com/?ctiid.344857
signaturepermissions-required
https://vuldb.com/?submit.748236
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)
.