The vulnerability of the telnetd.sh script of the D-Link DIR-600L router’s telnet service allows a hacker to gain unauthorized access to protected information, increase their privileges, and execute arbitrary commands.

The vulnerability of the telnetd.sh script of the D-Link DIR-600L router’s telnet service is related to the use of a static password, wrgn61dlwbrdir600L, for the Alphanetworks account. Exploiting this vulnerability allows an attacker to gain unauthorized access to protected information, enhance...

CVE-2026-42376

D-Link DIR-456U Hardware Revision A1 End-of-Life, EOL contains a hardcoded telnet backdoor. The device starts a telnet daemon at boot via /etc/init0.d/S80telnetd.sh with the username "Alphanetworks" and the static password "whdrv01dlobdir456U" read from /etc/config/imagesign. The custom telnetd...

CVE-2026-42373

D-Link DIR-605L Hardware Revision B2 End-of-Life, EOL 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 "wrgn76dlwbrdir605L" read from /etc/alphaconfig/imagesign. The custom telnetd binary...

CVE-2026-42372

D-Link DIR-605L Hardware Revision A1 End-of-Life, EOL 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 "wrgn35dlwbrdir605l" read from /etc/alphaconfig/imagesign. The custom telnetd binary...

EUVD-2026-27029

D-Link DIR-456U Hardware Revision A1 End-of-Life, EOL contains a hardcoded telnet backdoor. The device starts a telnet daemon at boot via /etc/init0.d/S80telnetd.sh with the username "Alphanetworks" and the static password "whdrv01dlobdir456U" read from /etc/config/imagesign. The custom telnetd...

CVE-2026-42376 D-Link DIR-456U A1 Hardcoded Telnet Backdoor Credentials

D-Link DIR-456U Hardware Revision A1 End-of-Life, EOL contains a hardcoded telnet backdoor. The device starts a telnet daemon at boot via /etc/init0.d/S80telnetd.sh with the username "Alphanetworks" and the static password "whdrv01dlobdir456U" read from /etc/config/imagesign. The custom telnetd...

CVE-2026-42376

CVE-2026-42376 affects D-Link DIR-456U hardware revision A1 (End-of-Life). The description reports a hardcoded telnet backdoor: at boot a telnet daemon runs with username “Alphanetworks” and password read from /etc/config/image_sign; a -u user:password flag is accepted by the custom telnetd, and ...

CVE-2026-42375 D-Link DIR-600L A1 Hardcoded Telnet Backdoor Credentials

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 accep...

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...

EUVD-2026-27025

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 accep...

CVE-2026-42374

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 accep...

EUVD-2026-27023

D-Link DIR-605L Hardware Revision B2 End-of-Life, EOL 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 "wrgn76dlwbrdir605L" read from /etc/alphaconfig/imagesign. The custom telnetd binary...

CVE-2026-42373

D-Link DIR-605L Hardware Revision B2 (End-of-Life) ships a hardcoded telnet backdoor. At boot, a telnet daemon starts via /bin/telnetd.sh with username "Alphanetworks" and a static password read from /etc/alpha_config/image_sign. The custom telnetd/login binaries validate credentials using strcmp...

CVE-2026-42373

D-Link DIR-605L Hardware Revision B2 End-of-Life, EOL 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 "wrgn76dlwbrdir605L" read from /etc/alphaconfig/imagesign. The custom telnetd binary...

CVE-2026-42372 D-Link DIR-605L A1 Hardcoded Telnet Backdoor Credentials

D-Link DIR-605L Hardware Revision A1 End-of-Life, EOL 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 "wrgn35dlwbrdir605l" read from /etc/alphaconfig/imagesign. The custom telnetd binary...

CVE-2026-42372

D-Link DIR-605L Hardware Revision A1 End-of-Life, EOL 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 "wrgn35dlwbrdir605l" read from /etc/alphaconfig/imagesign. The custom telnetd binary...

D-Link DIR-600L 信任管理问题漏洞

The D-Link DIR-600L is an entry-level wireless router from D-Link Corporation. It supports 150Mbps wireless transmission and has 4 Gigabit wired ports. The DIR-600L has a trust management vulnerability, which stems from a hard-coded telnet backdoor. This vulnerability could allow unauthenticated...

CVE-2026-42372: Use of Hard-coded Credentials

D-Link DIR-605L Hardware Revision A1 End-of-Life, EOL 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 "wrgn35dlwbrdir605l" read from /etc/alphaconfig/imagesign. The custom telnetd binary...

CVE-2026-42375: Use of Hard-coded Credentials

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 accep...

D-Link DIR-605L 信任管理问题漏洞

The D-Link DIR-605L is a wireless router produced by D-Link Corporation. The D-Link DIR-605L Hardware Revision B2 version has a vulnerability related to trust management. This vulnerability stems from a hard-coded telnet backdoor, which allows unauthenticated attackers on the local network to...