@alyx@gameliberty.club the entire adobe suite
@asa_2 @GNUxeava
Don't know if it's been exploited the most, but it's probably up there. Besides, Adobe Reader is the most bloated pdf reader I know.
I've thought about Chrome too, but it's a weird one, cause technically it's a mix of proprietary and open-source software. But the proprietary pieces within it are definitely pretty bad.