Command Injection Vulnerability in D-Link Network Attached Storage Products
CVE-2026-4204

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-2026-4204?

A command injection vulnerability exists in D-Link's network attached storage devices due to improper handling of user-supplied input in the cgi_myfavorite functions of the /cgi-bin/gui_mgr.cgi file. This flaw allows remote attackers to inject arbitrary commands through the f_user argument. Exploitation of this issue could lead to severe unauthorized control over the affected D-Link devices, as the exploit is readily available in the public domain.

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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-2026-4204 - Proof of Concept

References

https://vuldb.com/?id.351116
vdb-entrytechnical-description
https://vuldb.com/?ctiid.351116
signaturepermissions-required
https://vuldb.com/?submit.770409
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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