In 2019, my very close friend had secured around 10k Rank in VITEEE, and secured CSE at Vellore in Category 2 of Counselling. At 16.8k, I dont believe youll get CSE or any CSE Specialization till Category 2, or maybe low chances of securing CSE/CSE (Spez) at Category 3. I would advise you to opt for IT/ECE/EEE  which are equally good at VIT upto the Category 2 of Counselling, and I believe youll be able to make into one of them. Another option could be trying for CS/IT/ECE at Chennai Campus, under Category 1 or 2, but dont really compromise on Branch below ECE/EEE. VIT has strong placements, faculty and employer outlook for the Top 3-4 Branches, but not for others.

For more information and VIT Cutoff do follow the link below

https://engineering.careers360.com/articles/viteee-cutoff