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...
VSI plans to add the x86 version to the free community license program [1] at a later date.
In the mean time, the Alpha version runs very well under emulation, and is available both under the CLP (free, registration required[1]; also includes Itanium, though AFAIK no emulators capable of running it exist), and as a freely downloadable (no registration required), preinstalled student kit bundled with a preconfigured Windows emulator[2].
Note that the "student" license is unrestricted for non-commercial use; you don't have to be an actual student to use it.
[1] https://vmssoftware.com/community/community-license/ (note "x86 (planned)")