CVE-2026-4214 | D-Link DNS-1550-04 up to 20260205 /cgi-bin/app_mgr.cgi UPnP_AV_Server_Path_Setting stack-based overflow

A vulnerability was 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 and classified as critical. 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 identification of this vulnerability is CVE-2026-4214. The attack may be launched remotely. Furthermore, there is an exploit available.