CVE Catalog

CVE-2026-42372

High
Published: Translated: NVD NIST

Summary

D-Link DIR-605L Hardware Revision A1 contains a hardcoded telnet backdoor. The device starts a telnet daemon at boot with the username 'Alphanetworks' and the static password 'wrgn35_dlwbr_dir605l'.

Risk Assessment

An attacker on the local network can gain root shell access with full administrative control, posing a significant security risk to the organization. The device has reached End-of-Life (EOL) and will not receive patches.

Recommendation

It is recommended to immediately disable or replace the device to minimize the risk associated with this vulnerability.

Related vulnerabilities

Original NVD description (English source)

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 "wrgn35_dlwbr_dir605l" read from /etc/alpha_config/image_sign. 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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS