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

CVE ID :CVE-2026-42372
Published : May 4, 2026, 3:53 p.m. | 1 hour, 1 minute ago
Description :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.
Severity: 8.8 | HIGH
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