Teen hacker who exposed CBSE portal's flaws slams billionaire Vembu, calls his apps 's****y'. Teen hacker Nisarga, who exposed flaws in CBSE's OSM exam portal, slammed billionaire Zoho Founder Sridhar Vembu, who said India should stop sending troops to the United Nations. "We must also refuse to use the s****y and insecure software Zoho products," he said, adding, "Zoho has had critical vulnerabilities in its product ecosystem that were actively exploited by threat actors.".