CSIR NET is conducted for the subjects:

Chemical Science, Earth Science, Life Science, Mathematical Science and Physical Science.

For CSIR NET you will need to mathematics at the level of BSc & MSc. To know about the Mathematical Science syllabus for NET you may visit:

https://static.careers360.mobi/media/uploads/froala_editor/files/CSIR_Mathematical%20Sciences.pdf

There are no issues with the class 10 Mathematics.

To know more about CSIR NET you may visit the link below:

https://competition.careers360.com/articles/csir-ugc-net

I hope my answer helps. All the very best for your future endeavors!