CVE-2026-4203

| EUVD-2026-12275 MEDIUM
2026-03-16 VulDB
6.3
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

Lifecycle Timeline

4
PoC Detected
Mar 16, 2026 - 14:53 vuln.today
Public exploit code
Analysis Generated
Mar 16, 2026 - 02:00 vuln.today
EUVD ID Assigned
Mar 16, 2026 - 02:00 euvd
EUVD-2026-12275
CVE Published
Mar 16, 2026 - 01:02 nvd
MEDIUM 6.3

Tags

Command Injection D-Link RCE Dhcp Dns Dnr 202l Dns 1100 4 Dns 345 Dns 726 4 Dns 321 Dns 323 Dns 327l Dns 325 Dns 120 Dns 343 Dns 320l Dnr 322l Dns 1550 04 Dns 320 Dnr 326 Dns 326 Dns 315l Dns 1200 05 Dns 320lw Dns 340l

Description

A vulnerability was detected in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323, DNS-325, DNS-326, DNS-327L, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05 and DNS-1550-04 up to 20260205. Impacted is the function cgi_portforwarding_add/cgi_portforwarding_del/cgi_portforwarding_modify/cgi_portforwarding_add_scan/cgi_dhcpd_lease/cgi_ddns/cgi_ip/cgi_dhcpd of the file /cgi-bin/network_mgr.cgi. The manipulation results in command injection. The attack may be launched remotely. The exploit is now public and may be used.

Analysis

Command injection in D-Link DNS and DNR network attached storage devices allows authenticated remote attackers to execute arbitrary commands through multiple CGI functions in the network management interface. The vulnerability affects numerous models up to firmware version 20260205, and public exploit code is available. …

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Validate input sanitization for user-controlled parameters.

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Priority Score

52
Low Medium High Critical
KEV: 0
EPSS: +0.4
CVSS: +32
POC: +20

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CVE-2026-4203 vulnerability details – vuln.today
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