Exim exploit to access control panel

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Is it possible to root access control panel by exploiting exim if is this possible how hard it is on a rating of 1 to 10 I contacted a hacker for hiring to hack and get root access for a control panel and he said : i will execute it as the root user on the server this will make me gain control of the Exim serverAs ISPmanager uses Exim Is it even possible ?