CVE-2026-4214

| EUVD-2026-12329 HIGH
2026-03-16 VulDB
8.8
CVSS 3.1
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CVSS Vector

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

Lifecycle Timeline

4
PoC Detected
Mar 16, 2026 - 14:53 vuln.today
Public exploit code
Analysis Generated
Mar 16, 2026 - 05:00 vuln.today
EUVD ID Assigned
Mar 16, 2026 - 05:00 euvd
EUVD-2026-12329
CVE Published
Mar 16, 2026 - 04:32 nvd
HIGH 8.8

Tags

Buffer Overflow D-Link Stack Overflow Dns 320lw Dns 323 Dns 1100 4 Dns 320 Dnr 202l Dns 340l Dns 1550 04 Dnr 322l Dns 120 Dns 326 Dns 315l Dns 726 4 Dns 320l Dns 327l Dnr 326 Dns 325 Dns 345 Dns 343 Dns 321 Dns 1200 05

Description

A flaw has been found 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. This issue affects the function UPnP_AV_Server_Path_Setting of the file /cgi-bin/app_mgr.cgi. Executing a manipulation can lead to stack-based buffer overflow. The attack may be launched remotely. The exploit has been published and may be used.

Analysis

Stack-based buffer overflow in D-Link NAS devices (DNS-120, DNR-202L, DNS-315L, DNS-320 series, DNS-326, DNS-1100-4, and others) through the UPnP_AV_Server_Path_Setting function in /cgi-bin/app_mgr.cgi allows authenticated remote attackers to achieve complete system compromise with high integrity, confidentiality, and availability impact. Public exploit code exists for this vulnerability, and no patch is currently available.

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Remediation

Within 24 hours: Inventory all D-Link DNS/DNR series devices and identify firmware versions up to 20260205; disable remote access to affected devices if business-critical alternatives exist. Within 7 days: Implement network segmentation to restrict NAS access to authorized personnel only, enable enhanced logging/monitoring on all identified devices, and establish a vendor communication protocol to track D-Link patch timelines. …

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Priority Score

64
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +44
POC: +20

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CVE-2026-4214 vulnerability details – vuln.today
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