Alcatel Speed Touch Home ADSL Modem allows remote attackers to cause a denial of service (reboot) via a network scan with unusual packets, such as nmap with OS detection.

Alcatel ADSL modems allow remote attackers to access the Trivial File Transfer Protocol (TFTP) to modify firmware and configuration via a bounce attack from a system on the local area network (LAN) side, which is allowed to access TFTP without authentication.

The challenge-response authentication of the EXPERT user for Alcatel Speed Touch running firmware KHDSAA.108 and KHDSAA.132 through KHDSAA.134 allows remote attackers to gain privileges by directly computing the response based on information that is provided by the device during login.

Alcatel Speed Touch running firmware KHDSAA.108 and KHDSAA.132 through KHDSAA.134 has a TFTP server running without a password, which allows remote attackers to change firmware versions or the device's configurations.

Alcatel Speed Touch ADSL modem running firmware KHDSAA.108, KHDSAA.132, KHDSBA.133, and KHDSAA.134 has a blank default password, which allows remote attackers to gain unauthorized access.