CVE-2026-4214

D-Link DNS-1550-04 app_mgr.cgi UPnP_AV_Server_Path_Setting stack-based overflow

State: Published
Severity: 8.7 High
Published: Mar 16, 2026
Updated: Mar 16, 2026
Reserved: Mar 15, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	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	VulDB
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R	VulDB
3.0	8.8 High	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R	VulDB
2.0	9.0 High	AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR	VulDB

Weaknesses

CWE-121 Stack-based Buffer Overflow
CWE-119 Memory Corruption

Affected Products

Product	Versions
DNS-120D-Link	20260205Affected
DNR-202LD-Link	20260205Affected
DNS-315LD-Link	20260205Affected
DNS-320D-Link	20260205Affected
DNS-320LD-Link	20260205Affected
DNS-320LWD-Link	20260205Affected
DNS-321D-Link	20260205Affected
DNR-322LD-Link	20260205Affected
DNS-323D-Link	20260205Affected
DNS-325D-Link	20260205Affected
DNS-326D-Link	20260205Affected
DNS-327LD-Link	20260205Affected
DNR-326D-Link	20260205Affected
DNS-340LD-Link	20260205Affected
DNS-343D-Link	20260205Affected
DNS-345D-Link	20260205Affected
DNS-726-4D-Link	20260205Affected
DNS-1100-4D-Link	20260205Affected
DNS-1200-05D-Link	20260205Affected
DNS-1550-04D-Link	20260205Affected

References

VDB-351125 | D-Link DNS-1550-04 app_mgr.cgi UPnP_AV_Server_Path_Setting stack-based overflowvdb-entrytechnical-description
VDB-351125 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
Submit #770445 | D-Link DNS-120/202L/315L/320/320L/320LW/321/322L/323/325/326/327L/326/340L/343/345/726-4/1100-4/1200-05/1550-04 up to 20260205 Stack-based Buffer Overflowthird-party-advisory
https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_164/164.mdexploit
https://www.dlink.com/product

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