CBSE cybersecurity team monitors OnMark portal ahead of Class 12 re-evaluation launch
Synopsis
CBSE has deployed IIT experts and multi-agency cybersecurity professionals to fix vulnerabilities in the OnMark portal — just hours before Class 12 re-evaluation applications open on Monday. With nearly 4 lakh students already accessing 11 lakh answer sheets, the stakes around portal security are unusually high for a board examination process.
Key Takeaways
CBSE confirmed its cybersecurity team, including IIT experts and government professionals, is monitoring the OnMark portal for vulnerabilities.
The Post-Result Activities portal opens on Monday for Class 12 verification and re-evaluation applications.
Nearly 4 lakh students have already accessed approximately 11 lakh scanned answer sheets .
Earlier technical glitches had forced CBSE to repeatedly extend re-evaluation application deadlines.
Students can report vulnerabilities to secy-cbse@nic.in and reach the helpline at 1800 11 8004 .
The Central Board of Secondary Education (CBSE) on Sunday, 1 June 2025 confirmed that a dedicated cybersecurity team is actively monitoring vulnerabilities in the OnMark portal — its re-evaluation service provider's platform — ahead of the Class 12 post-result activities window opening on Monday. The Board assured students that identified weaknesses have been contained and that systems are being migrated to a more secure infrastructure.
Portal Goes Live for Re-evaluation Applications
Starting Monday, CBSE's Post-Result Activities portal will allow Class 12 students to submit applications for verification and re-evaluation of answer books. The option is available exclusively to students who have already received scanned copies of their evaluated answer sheets through the portal.
So far, nearly 4 lakh students have accessed approximately 11 lakh scanned answer sheets through the system, according to the Board.
What the Board Said on Cybersecurity
'We have been closely monitoring the vulnerabilities in the OnMark portal of our service provider that are being flagged in the public domain. An expert team of cybersecurity professionals has been deployed over the last few days from across various arms of the government as well as the IITs to fortify these systems, including taking them over to a more secure set up,' the Board said in an official statement.
CBSE added that it has already been in direct contact with some of the ethical hackers and alert citizens who flagged the weaknesses, and urged others to write to secy-cbse@nic.in with further inputs.
Background: Glitches Delayed the Process
This comes amid a troubled rollout — earlier technical glitches had forced the CBSE to repeatedly extend the deadline for filing re-evaluation applications and depositing fees. The cybersecurity scrutiny of the OnMark portal follows public flagging of exploitable vulnerabilities, raising concerns about the safety of student data and the integrity of the marks-review process.
Notably, the deployment of IIT experts and multi-agency government professionals to audit and harden a board examination portal is an unusual step, underscoring the seriousness with which CBSE is treating the reported weaknesses.
How Re-evaluation Works
Once an application is received, subject experts review the flagged questions and update marks if discrepancies are found. Students who have not yet accessed their scanned answer sheets are not eligible to apply for re-evaluation at this stage.
Helpline for Students
The CBSE has directed students with queries to reach its Tele-Counselling Helpline at 1800 11 8004 or write to resultcbse2026@cbseshiksha.in. The Board has urged students not to panic and to use official channels for all concerns related to the re-evaluation process.
With the portal set to go live on Monday, the focus now shifts to whether the security upgrades hold up under the high traffic expected from lakhs of Class 12 students filing applications simultaneously.
Point of View
While reassuring in tone, also raises an uncomfortable question: why was a portal handling sensitive student marks data not stress-tested for security before results were published? The repeated deadline extensions, now followed by a last-minute security overhaul, suggest systemic gaps in CBSE's vendor oversight framework. If the portal holds on Monday, the story ends here. If it does not, the accountability will fall on both the Board and its service provider.
NationPress
17 Jul 2026
Frequently Asked Questions
What is the CBSE OnMark portal and why is it in the news?
The OnMark portal is a platform operated by CBSE's service provider that allows Class 12 students to access scanned answer sheets and apply for re-evaluation. It is in the news because cybersecurity vulnerabilities were publicly flagged, prompting CBSE to deploy IIT experts and government professionals to fix the weaknesses before the re-evaluation window opens.
When does the CBSE Class 12 re-evaluation portal open?
The CBSE Post-Result Activities portal opens on Monday for Class 12 students to file applications for verification and re-evaluation of answer books. Only students who have already received scanned copies of their answer sheets are eligible to apply.
How many students have accessed their CBSE answer sheets so far?
According to CBSE, nearly 4 lakh students have accessed approximately 11 lakh scanned answer sheets through the portal as of the Board's latest update.
How can students or ethical hackers report CBSE portal vulnerabilities?
CBSE has asked citizens and ethical hackers to report any exploitable weaknesses by writing to secy-cbse@nic.in. Students with general queries can call the Tele-Counselling Helpline at 1800 11 8004 or email resultcbse2026@cbseshiksha.in.
Why was the CBSE re-evaluation deadline extended earlier?
Technical glitches in the OnMark portal had previously disrupted the application and fee-payment process, forcing CBSE to extend the deadline for re-evaluation applications multiple times before the current security-hardened relaunch.
