The Central Board of Secondary Education (CBSE) on Monday, in a post on X, said its revaluation portal was targeted by multiple cyberattacks, including a denial-of-service (DDoS) attack that generated 1.5 million hits within two minutes and over one lakh attempts at unauthorised file access.It added that the portal continues to support over 8,000 concurrent users and had processed more than 16,000 successful submissions by 3 pm. The board further mentioned that security teams remained vigilant and had also extended session time limits to improve user experience.The development sparked reactions online, with users questioning the robustness of the portal’s cybersecurity measures.User comments included: “DDoS attacks are common. Public portals should handle them before launch. This explanation raises serious questions about competence. Consider hiring a reputed cybersecurity firm through a transparent process.”Another user remarked, “Less of a revaluation portal, more of a nation-scale cybersecurity battleground,” while a third asked, “Is adequate cybersecurity expert & infrastructure available with you?”Update from our Cybersecurity Teams:The CBSE revaluation portal is currently supporting over 8,000 concurrent users. As of 3:00 PM today, more than 16,000 students have successfully completed their submissions.While thousands of students accessed the CBSE re-evaluation portal…— CBSE HQ (@cbseindia29) June 2, 2026