The All India ranking list was declared on June 30 but some states such as Telengana had failed to provide the scores by then, putting the academic career of thousands of students of these states at stake.
"However, the board has decided to issue a revised list on July 8, 2015, to safeguard the interests of students, and as requested by the joint seat allocation authorities for admissions," CBSE said in a statement.
CBSE said that despite several reminders, "defaulting" State boards including Telangana updated the information as late as July 3, "thus creating this situation at the time of joint counselling for admission".
It also dismissed media reports, saying there was no delay in declaration of the ranking list as claimed.
The ranking list was declared on July 8 last year and the schedule for this year was July 5. The ranks were declared on June 30.