Older versions of VMS have a showstopper login bug that can be used to obtain the full privilege of the kernel.
There are many older VMS installations where this cannot be fixed, and more still where it is not worth the trouble of engaging a support contract to obtain the patches.
There are many older VMS installations where this cannot be fixed, and more still where it is not worth the trouble of engaging a support contract to obtain the patches.
https://www.theregister.co.uk/2018/02/06/openvms_vulnerabili...