Mojo66 writes "A recently reported flaw that allowed an attacker to drastically reduce the number of attempts needed to guess the WPS PIN of a wireless router isn't necessary for some Arcadyan based routers anymore. According to German computer publisher Heise, some 100,000 routers of type Speedport W921V, W504V and W723V are affected in Germany alone. (Google translation, original here.) What makes things worse is the fact that in order to exploit the backdoor, no button has to be pushed on the device itself and on some of the affected routers, the backdoor PIN ("12345670") is still working even after WPS has been disabled by the user. The only currently known remedy for those models is to disable Wi-Fi altogether. Since all Arcadyan routers share the same software platform, more models might be affected."