Dear Aayush,

To get the main campus of SRM for CSE you need to come under the rank of 10K ( specialization included ), as your rank is 26871 so there a no chance for you to get the CSE here, you can try other branches like IT whose cutoff rank is approx 20K ( it fluctuates every year so there is that you might get IT here ). You can also choose for ECE or SE whose cutoff rank is between 25-30K, no its up to you whether you take another branch in main campus or try another college or campus.

Best Of Luck!!!