At the time Rodrigues wrote the blog post, Shodan searches revealed more than 600,000 affected modems in the wild. Vulnerable cable modem models including TG862A, TG862G and DG860A. And believe it or not, Arris modems have a third backdoor as outlined on the ConsoleCowboys blog. The security researcher said he went public with the backdoor after reporting it and waiting more than 65 days without a fix.