Description
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 -wrgn76_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.
CVSS 9.8EPSS 0.47200000000000003%Risk 1.02
View source- Published
- 2026-05-04 17:16:25
- Affected versions
- unknown
- Type
- Firmware
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H