CVE-2026-42375

D-Link DIR-600L A1 (End-of-Life) is affected by CVE-2026-42375 due to a hardcoded telnet backdoor. The device runs a telnet daemon at boot via /bin/telnetd.sh with the username "Alphanetworks" and the static password read from /etc/alpha_config/image_sign. The custom telnetd binary accepts a -u u...