What happened

Education Ministry cancelled the exam a day after it was held citing compromised integrity (darknet/Telegram alert); CBI later filed a closure report finding the "leaked" screenshot was doctored by a student and no actual leak occurred. No arrests.

What was done

Exam cancelled
Official probe — CBI/SIT

Source

Primary reference The Tribune ↗ https://www.tribuneindia.com/news/india/cbi-closes-ugc-net-paper-leak-case-finds-no-evidence-of-breach

This entry summarises the linked report. Where the summary and the source disagree, the source wins — and please tell us.