CVE-2026-4213

| EUVD-2026-12327 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-2026-12327
CVE Published
Mar 16, 2026 - 04:02 nvd
HIGH 8.8

Tags

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

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. This vulnerability affects the function cgi_myfavorite_del_user/cgi_myfavorite_verify of the file /cgi-bin/gui_mgr.cgi. Performing a manipulation results in stack-based buffer overflow. The attack may be initiated remotely. The exploit is now public and may be used.

Analysis

Stack-based buffer overflow in D-Link DNS storage appliances (DNS-120, DNS-340L, DNS-1200-05 and others) through the /cgi-bin/gui_mgr.cgi endpoint allows remote authenticated attackers to achieve code execution. Public exploit code exists for this vulnerability, and no patch is currently available. …

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Remediation

Within 24 hours: Identify all D-Link NAS devices in your environment and restrict network access to the CGI management interface to authorized administrators only. Within 7 days: Isolate affected NAS devices to a segmented network if they contain sensitive data, review access logs for suspicious activity, and contact D-Link support for patch timelines. …

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Priority Score

64
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +44
POC: +20

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CVE-2026-4213 vulnerability details – vuln.today
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