FON La Fonera routers do not properly limit DNS service access by unauthenticated clients, which allows remote attackers to tunnel traffic via DNS requests for hosts that should not be accessible before authentication.

Unspecified vulnerability on the La Fonera+ router with firmware before 1.7.0.1 allows remote attackers to cause a denial of service via unknown vectors.

FON2601E-SE, FON2601E-RE, FON2601E-FSW-S, and FON2601E-FSW-B with firmware versions 1.1.7 and earlier contain an issue where they may behave as open resolvers. If this vulnerability is exploited, FON routers may be leveraged for DNS amplification attacks to some other entities.