CVE-2026-4207 | D-Link DNS-1550-04 up to 20260205 /cgi-bin/system_mgr.cgi command injection

A vulnerability described as critical has been identified 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 impacts the function cgi_device/cgi_sms_test/cgi_firmware_upload/cgi_ntp_time of the file /cgi-bin/system_mgr.cgi. Executing a manipulation can lead to command injection.

This vulnerability appears as CVE-2026-4207. The attack may be performed from remote. In addition, an exploit is available.