In IgniteNet HeliOS GLinq v2.2.1 r2961, the langSelection parameter is stored in the luci configuration file (/etc/config/luci) by the authenticator.htmlauth function. When modified with arbitrary javascript, this causes a denial-of-service condition for all other users.
In IgniteNet HeliOS GLinq v2.2.1 r2961, if a user logs in and sets the ‘wan_type’ parameter, the wan interface for the device will become unreachable, which results in a denial of service condition for devices dependent on this connection.