CBSE cybersecurity teams fortify OnMark portal amid Class 12 evaluation concerns
Synopsis
CBSE's Class 12 digital evaluation rollout has hit turbulence — over 68,000 answer sheets rescanned, 13,500 manually re-verified, and IIT cybersecurity teams now called in to patch vulnerabilities in the OnMark portal. The board says no live data was breached, but the admission that the system launched without a nationwide pilot raises hard questions about institutional readiness.
Key Takeaways
CBSE deployed cybersecurity experts from government agencies and IITs to fortify the OnMark portal after public vulnerability disclosures.
More than 68,000 answer sheets were reportedly rescanned due to technical issues with the On-Screen Marking (OSM) system.
Around 13,500 answer books required manual verification because of image-quality and related technical concerns.
CBSE confirmed the flagged URL belonged to a test environment with sample data — not the live evaluation system — and denied any data breach.
The OSM system was reportedly introduced for Class 12 evaluations without a prior nationwide pilot project.
CBSE has invited ethical hackers and citizens to report further vulnerabilities at secy-cbse@nic.in .
The Central Board of Secondary Education (CBSE) announced on Sunday, 31 May that cybersecurity professionals from government agencies and the Indian Institutes of Technology (IITs) have been deployed to strengthen its OnMark portal, used for Class 12 on-screen evaluation, after vulnerabilities were flagged in the public domain. The board confirmed that identified weaknesses have been contained and that further exploitable gaps are being ruled out.
What CBSE Said
In an official statement, the board said it has been 'closely monitoring the vulnerabilities in the OnMark portal of our service provider that are being flagged in the public domain.' It added that an expert cybersecurity team has been working over the past several days to migrate systems to a 'more secure set-up.'
CBSE also acknowledged the role of 'alert citizens and ethical hackers' in flagging weaknesses, stating that the board has contacted some of them directly. It invited others to write to secy-cbse@nic.in with further inputs.
Scale of Technical Disruptions
The controversy centres on CBSE's newly introduced On-Screen Marking (OSM) system for Class 12 evaluations. According to available information, the board rolled out the digital evaluation mechanism without first conducting a nationwide pilot project — a decision that reportedly contributed to subsequent technical difficulties.
The scale of disruption has been significant. More than 68,000 answer sheets were reportedly rescanned, while around 13,500 answer books required manual verification due to image-quality concerns and related technical issues. A large number of students have also sought access to their evaluated answer sheets after noticing unexpected variations in their scores.
No Data Breach, CBSE Maintains
Despite mounting scrutiny, CBSE has firmly rejected allegations of a data breach or hacking of its live systems. The board clarified that a web link highlighted by a cybersecurity researcher was associated with a testing environment containing only sample data — not the live portal used for actual examination evaluation or student records.
According to CBSE, the flagged URL did not provide access to real examination records or operational evaluation infrastructure. The board reiterated that no breach of the live system had occurred.
Wider Context and What Comes Next
This comes amid heightened scrutiny from students, parents, and educators over the functioning of the new digital evaluation mechanism. The OSM system's rollout without a full-scale pilot has drawn particular criticism, with questions raised about whether adequate testing was conducted before deployment at national scale.
CBSE officials have said efforts are underway to improve system reliability, strengthen cybersecurity protections, and address concerns raised during the evaluation cycle. The board's handling of the crisis — and whether it can restore confidence in the integrity of Class 12 results — will be closely watched in the weeks ahead.
Point of View
Not merely a technical one. With over 68,000 answer sheets rescanned, the integrity of Class 12 results is a legitimate public concern, and the board's reassurances will carry little weight unless it publishes a transparent audit of how many scores were materially affected. The pattern of deploying large-scale edtech infrastructure without adequate stress-testing is not new in Indian public administration, but the stakes here — students' futures — demand a higher standard of accountability than a press statement.
NationPress
19 Jul 2026
Frequently Asked Questions
What is the CBSE OnMark portal and why is it under scrutiny?
The OnMark portal is the digital platform CBSE uses for its On-Screen Marking (OSM) system, through which Class 12 answer sheets are evaluated electronically. It came under scrutiny after cybersecurity vulnerabilities were flagged publicly and reports emerged of technical glitches affecting thousands of answer sheets.
Was there a data breach of CBSE's live examination system?
CBSE has denied any breach of its live evaluation infrastructure. The board clarified that a URL flagged by a cybersecurity researcher was linked to a testing environment containing only sample data, and did not provide access to real student records or operational evaluation systems.
How many answer sheets were affected by the technical issues?
According to available information, more than 68,000 answer sheets were rescanned, while around 13,500 answer books required manual verification due to image-quality concerns and related technical problems during the digital evaluation process.
Why did CBSE introduce the On-Screen Marking system without a pilot?
Reports indicate the board implemented the OSM system for Class 12 evaluations without conducting a nationwide pilot project beforehand. CBSE has not publicly explained the decision to skip a full-scale trial, and the absence of prior testing has been a focal point of criticism from educators and parents.
What is CBSE doing to fix the OnMark portal vulnerabilities?
CBSE has deployed an expert team of cybersecurity professionals from government agencies and IITs to fortify the OnMark systems, including migrating them to a more secure set-up. The board says identified vulnerabilities have been contained and that it is actively ruling out other exploitable weaknesses.
