CBSE Revaluation Portal Hit by Cyber Attack
On May 30, 2026, the CBSE (Central Board of Secondary Education) revaluation portal in India was hit by a cyber attack. The incident affected approximately 50 students, disrupting their access and allegedly altering revaluation-related records, causing confusion during the answer sheet review process.
Signal context
First seen: May 30, 2026
Last updated: Jun 29, 2026
Status: Public signal
Key points
- CBSE revaluation portal affected.
- Around 50 students impacted.
- Disrupted student access and allegedly altered revaluation records.
Signal analysis
BetaThis analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.
Sector: Educational Services
Likely country: 🇮🇳 India
inferred from company domain
Watch internet-facing systems, credential abuse and exploit activity.
- Source type: outside the affected organization
Impact area: Confidentiality
- 3 signals in the same sector
- 90 signals with the same likely impact area
- 1 signal linked to this organization/domain
External sources
Biggest Cyber Attacks, Data Breaches, Ransomware Attacks of May 2026https://www.cm-alliance.com/cybersecurity-blog/biggest-cyber-attacks-data-breaches-ransomware-attacks-of-may-2026Public source from cm-alliance.com.
IT Security Weekend Catch Up – May 30, 2026 | BadCyberhttps://badcyber.com/it-security-weekend-catch-up-may-30-2026/Public source from badcyber.com.
Related signals
Grouped by why the signal is relevant.
Mount Royal University Announces Cyber Security Incident
Mount Royal University announced on June 19, 2026, that disruptions to its websites and portals were the result of a cyber incident. The investigation is in its early stages, and it has not yet been determined if personal information or other data was accessed or taken.
Nissan Employee Data Breach Linked to Oracle PeopleSoft Zero-Day
Nissan disclosed an employee data breach linked to the exploitation of the Oracle PeopleSoft CVE-2026-35273 vulnerability as a zero-day. The attacks, primarily impacting organizations in the education sector, occurred between May 27 and June 9, 2026.
NIFTY Corporation Affected by KDDI Corporation Data Breach
NIFTY Corporation, a Japanese internet service provider, was impacted by a data breach originating from an email system provided by KDDI Corporation. Threat actors gained unauthorized access to this shared system by exploiting a vulnerability in third-party software. This led to the potential exposure of up to 14.2 million email addresses and passwords across all affected ISPs. NIFTY Corporation customers' email addresses and passwords may have been compromised.
BIGLOBE Inc. Affected by KDDI Corporation Data Breach
BIGLOBE Inc., a Japanese internet service provider, was impacted by a data breach originating from an email system provided by KDDI Corporation. Threat actors gained unauthorized access to this shared system by exploiting a vulnerability in third-party software. This led to the potential exposure of up to 14.2 million email addresses and passwords across all affected ISPs. BIGLOBE Inc. customers' email addresses and passwords may have been compromised.
STNet, Inc. Affected by KDDI Corporation Data Breach
STNet, Inc., a Japanese internet service provider, was impacted by a data breach originating from an email system provided by KDDI Corporation. Threat actors gained unauthorized access to this shared system by exploiting a vulnerability in third-party software. This led to the potential exposure of up to 14.2 million email addresses and passwords across all affected ISPs. STNet customers' email addresses and passwords may have been compromised.
KDDI Web Communications Customer Data Affected by KDDI Email System Breach
KDDI Web Communications, a subsidiary of KDDI, was impacted by the data breach in KDDI Corporation's email system, disclosed on June 28, 2026. The incident, caused by a third-party software vulnerability, led to the potential exposure of up to 14.2 million email addresses and passwords belonging to customers across six Japanese ISPs, including KDDI Web Communications.
