According to the people who rooted the chromecast a couple years ago -- https://blog.exploitee.rs/2013/chromecast-exploiting-the-newest-device-by-google/ https:

According to the people who rooted the chromecast a couple years ago -- https://blog.exploitee.rs/2013/chromecast-exploiting-the-newest-device-by-google/ https://blog.exploitee.rs/2013/chromecast-exploiting-the-new... -- the chromecast is using a modified Google TV base. So any hacking between the two platforms wouldn't be easily transferred. Even with the chromecast 2, there probably won't be easily transferable exploits as that is using a Marvell chip at its core.