Security researchers analyzed Comcast’s XR11 Xfinity Voice Remote found a way to turn it into a listening device without needing physical access or user interaction. The attack allowed taking over the remote and snooping on conversations from at least 65 feet (about 20 meters) Researchers found a weakness in the implementation of the RF4CE (Radio Frequency for Consumer Electronics) protocol responsible for encrypting the communication. Comcast has fixed the issues reported by Guardicore, confirming on September 24 that devices were no longer vulnerable to WarezTheRemote attack.
Source: https://www.bleepingcomputer.com/news/security/comcast-cable-remotes-hacked-to-snoop-on-conversations/