Some vector files (in SVG format mostly) can be used as a basis for creating new CAD drawings, like the ones in ISO STEP/STP format. This should be possible at least in some CAD program.
Convert XML based scalable vector graphics format to ISO-10303 STEP product data.
We have found one software suitable in our database for this conversion.
Multiplatform software - convert svg to step on any platform
FreeCAD is open source multiplatform 3D CAD/MCAD/CAx/CAE/PLM modeler used to design mechanical engineering projects.
Convert from svg file
to step file
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.