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D-Link CVE-2026-5211

| EUVD-2026-17613 HIGH
Stack-based Buffer Overflow (CWE-121)
2026-03-31 VulDB
Buffer Overflow D-Link Stack Overflow
7.4
CVSS 4.0
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CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

4
PoC Detected
Apr 02, 2026 - 17:14 vuln.today
Public exploit code
EUVD ID Assigned
Mar 31, 2026 - 19:47 euvd
EUVD-2026-17613
Analysis Generated
Mar 31, 2026 - 19:47 vuln.today
CVE Published
Mar 31, 2026 - 19:30 nvd
HIGH 7.4

DescriptionNVD

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 vulnerability affects the function UPnP_AV_Server_Path_Del of the file /cgi-bin/app_mgr.cgi. Executing a manipulation of the argument f_dir can lead to stack-based buffer overflow. The attack can be executed remotely. The exploit has been published and may be used.

AnalysisAI

Stack-based buffer overflow in D-Link NAS devices enables remote code execution with high integrity impact for authenticated users. The vulnerability resides in the UPnP_AV_Server_Path_Del function within /cgi-bin/app_mgr.cgi, exploitable via manipulation of the f_dir parameter. …

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RemediationAI

Within 24 hours: Inventory all D-Link NAS devices in production, identify affected models/firmware versions (up to 20260205), and document network access points and data sensitivity. Within 7 days: Restrict network access to affected NAS devices via firewall rules, disable UPnP services if not required, and enforce strong authentication (disable default credentials). …

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CVE-2026-5211 vulnerability details – vuln.today
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