During its early stage of release, remote access service was prone to hacking, given the number of security flaws it possessed.
In modern times, RAS technology such as that offered by TeamViewer is widely used by remote support workers and off-site individuals who deal with extremely sensitive data and therefore require the highest possible levels of security.
Consequently, most remote access service technology requires some form of third-party Open Autorisation token to be used in order to authorise the user.
For example, TeamViewer uses two-factor authentication, whereby a one-time unique access code is generated using an app on a registered trusted device. This security measure is a practical way to add extra security to the user log on process, and it decreases the chances of a random attack.