Whitepaper discussing the T-Com Speedport W 500 V router and related security issues that surround it.
You can download it from the following link: https://packetstormsecurity.com/files/download/74242/tcom_router.txt
Source: https://packetstormsecurity.com/files/74242/T-Com-Speedport-W-500-V-Router-Security-Issues.html