Cabling involves working on some stitches while holding others in reserve so it's easier to have a tool that helps make the process easier.
Here's some examples of things that can be used as Cable Needles:
Top: Commercial Cable Needle (recessed area holds stitches neatly without slipping).
Middle: Double Pointed Needle.
Bottom: Eyeliner Pencil (!) Point being – you can use whatever you have that is short and similar in circumference to the other main needles you are using to hold stitches in reserve.