The first, second and third stages all being solid rockets also means India now has a global-range ICBM, with only a little bit of modification needed to make it storable in a silo. Privately developed, but I would be astonished if the Indian military isn't well aware of this new capability.
The mil have had solid propulsion for a while https://en.wikipedia.org/wiki/Agni-VI
India has had the ability to reach LEO and beyond for a while now. So bringing down a nuke anywhere on the planet wouldn't be that difficult for them. That goes for any country that has LEO launch capabilities. Of course miniaturization of the nuclear payload is another matter.