Comcast subscribers are now recommended to change their passwords after the NullCrew FTS hacker group successfully hacked at least 34 Comcast servers. The hack took place earlier in February, but didn't receive much attention, and many Comcast users were still unaware they faced any type of security exploit.
All 34 Comcast mail servers fell victim to the same exploit.
Much to the delight of the hacker group, when originally targeting Comcast, a Comcast Twitter support team member naively asked "Hello, how can I help?", in which the group said, "Fix the vulnerabilities in your mail servers before we pwn them?, taunting the oblivious customer service rep.
Comcast is the biggest U.S. ISP and appears to have neglected closing a security hole in which the NullCrew FTS team was able to collect information - and didn't share customer data in a public pastebin - specifically targeting e-mail accounts.