ARS Technica writes a presentation at next month's Black Hat security conference will illustrate that millions of routers are vulnerable to DNS rebinding attacks:
A presentation due to be shown at the Black Hat security conference at the end of the month will show that many of the routers used for residential internet connections are vulnerable to attack by hackers. The attacks would allow traffic to be redirected and intercepted, in addition to giving hackers access to victims' local networks.
The title of the presentation, "How to Hack Millions of Routers," gives a clear indication of the scale of the potential issues. Popular router models from Netgear, Linksys, and Belkin were found to be vulnerable, including models used for Verizon's FIOS and DSL services, as were widely-used third-party firmwares such as DD-WRT and OpenWrt. About half the routers tested did not appear to be vulnerable.