Realtek SDK contains an improper input validation vulnerability in the miniigd SOAP service that allows remote attackers to execute malicious code via a crafted NewInternalClient request.

D-Link DIR-600L Hardware Revision B1 (End-of-Life) contains a hardcoded telnet backdoor. The device starts a telnet daemon at boot via /bin/telnetd.sh with the username "Alphanetworks" and the static password "wrgn61dlwbrdir600L" read from /etc/alphaconfig/imagesign. The custom telnetd binary accepts a -u user:password flag, and the custom login binary uses strcmp() to validate credentials. Successful authentication grants an unauthenticated attacker on the local network a root shell with full administrative control.  The device has reached End-of-Life (EOL) and will not receive patches.

D-Link DIR-600L Hardware Revision A1 (End-of-Life) contains a hardcoded telnet backdoor. The device starts a telnet daemon at boot via /bin/telnetd.sh with the username "Alphanetworks" and the static password "wrgn35dlwbrdir600l" read from /etc/alphaconfig/imagesign. The custom telnetd binary accepts a -u user:password flag, and the custom login binary uses strcmp() to validate credentials. Successful authentication grants an unauthenticated attacker on the local network a root shell with full administrative control. The device has reached End-of-Life (EOL) and will not receive patches.

Session fixation vulnerability in D-Link DIR-600L routers (rev. Ax) with firmware before FW1.17.B01 allows remote attackers to hijack web sessions via unspecified vectors.