CVE-2026-5211 | D-Link DNS-1550-04 up to 20260205 /cgi-bin/app_mgr.cgi UPnP_AV_Server_Path_Del f_dir 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. It has been declared as critical. 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.

This vulnerability is handled as CVE-2026-5211. The attack can be executed remotely. Additionally, an exploit exists.