The cutoff ranks for computer science and engineering branch are always very high in VIT as compared to all other branches.
Expected cutoffs at Vellore campus are :-
1) CSE : under 6,000
2) CSE with specialization in Information Security : under 7,000
3) CSE with specialization in Bioinformatics : under 10,000
4) Information Technology : under 11,000
Expected cutoffs at Chennai campus are:-
1) CSE : under 10,000
2) Electronics and Computer engineering : under 12,000
Here's a link to previous year cutoff trend :
So chances for you to get a CSE seat at Vellore campus are low.
But you've great chance at Chennai campus and you must try there.
If at all you miss that too, you could try for branch like Electronics and Communication engineering.
Hope this helps :)