CBSE Denies OSM Breach Claim; 19-Year-Old Hacker Shares ‘Video Evidence’ Of Vulnerability

The Central Board of Secondary Education (CBSE) on Tuesday issued a detailed clarification on its official X handle after facing widespread criticism over allegations that its On-Screen Marking (OSM) system had been compromised. The controversy began after a 19-year-old student, who identifies himself as “Nisarga” on social media, claimed that he had breached CBSE’s On-Screen Marking system in February 2026. He further alleged that the portal bearing the URL cbse.onmark.co.in had been compromised by him on February 26, 2026.

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