Command Injection Vulnerability in D-Link Network Attached Storage Devices
CVE-2026-4205

5.3MEDIUM

Key Information:

Vendor

D-link
Status
Dns-120
Dnr-202l
Dns-315l
Dns-320
Vendor
CVE Published:
16 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4205?

A command injection vulnerability exists in the D-Link DNS series of network attached storage devices. It impacts multiple models and is associated with the functions cgi_refresh_db, FTP_Server_BlockIP_Add, and FTP_Server_BlockIP_Del within the /cgi-bin/app_mgr.cgi file. Exploiting this vulnerability allows remote attackers to execute arbitrary commands on the affected devices by manipulating the input parameters, thereby compromising the integrity and security of the system. Users are advised to secure their devices and apply recommended mitigations promptly.

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Affected Version(s)

DNR-202L 20260205

DNR-322L 20260205

DNR-326 20260205

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-2026-4205 - Proof of Concept

References

https://vuldb.com/?id.351117
vdb-entrytechnical-description
https://vuldb.com/?ctiid.351117
signaturepermissions-required
https://vuldb.com/?submit.770410
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
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

Bond (VulDB User)
JSON
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