ZyXEL Prestige DSL router default password could allow unauthorized administrator access

zyxel-router-default-password (6968) The risk level is classified as HighHigh Risk

Description:

ZyXEL Prestige 642R and 642R-I DSL routers could allow a remote attacker to gain unauthorized access to the router¿s configuration, caused by a vulnerability in the default administrator password. A remote attacker could establish an FTP or Telnet connection to the router and perform configuration changes, such as firmware upgrades and password changes.

Platforms Affected:

  • ZyXEL, Prestige 342R
  • ZyXEL, Prestige 642R-1

Remedy:

No remedy available as of August 2001.

As a workaround, filter all port 21 and port 23 traffic from the WAN interface.

— OR —

Change the default administrator password.

Consequences:

Bypass Security

References:

Reported:

Aug 09, 2001

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