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Ransomware Attack Exposes Sensitive Data at Kudankulam Nuclear Power Plant

First seen 30 Oct 2026, 23:43 UTC • •

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ThreatCluster AI
ThreatCluster •October 31, 2026 at 01:13 UTC
  • •A ransomware attack exposed 14.3 GB of sensitive data linked to India's Kudankulam Nuclear Power Plant.
  • •India recorded over 29.44 lakh cyber incidents in 2025, marking an 85% increase from 2023.
  • •The average cost of data breaches in India reached ₹25.5 crore in 2026, reflecting rising cybersecurity threats.

A ransomware attack on Yotta, a third-party data center, exposed approximately 14.3 GB of sensitive files related to the Kudankulam Nuclear Power Plant, including engineering drawings and contracts. This incident is part of a broader trend of increasing cyber incidents in India, with CERT-In reporting over 29.44 lakh cyber incidents in 2025. The attack highlights vulnerabilities in India's critical infrastructure supply chains, exacerbated by reliance on private contractors. The average cost of data breaches in India has risen to ₹25.5 crore in 2026. The National Critical Information Infrastructure Protection Centre (NCIIPC) and CERT-In are involved in managing the response to such incidents. Recent incidents also include a cryptographic failure at eMudhra and customer data exposure at SBI, indicating systemic vulnerabilities in cybersecurity across sectors.

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Timeline

2025-01-01
CERT-In reports cyber incidents
CERT-In recorded over 29.44 lakh cyber incidents in 2025, an 85% increase from the previous year.
Insightsonindia
2026-10-27
Ransomware attack reported
Yotta's data breach exposed 14.3 GB of contractor data related to the Kudankulam Nuclear Power Plant.
Insightsonindia

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Common questions

What data was exposed in the attack?
The attack exposed approximately 14.3 GB of sensitive files, including engineering drawings and contracts related to the Kudankulam Nuclear Power Plant.
How many cyber incidents were reported in India in 2025?
India recorded over 29.44 lakh cyber incidents in 2025, marking an 85% increase from 2023.
What is the average cost of data breaches in India?
The average cost of data breaches in India reached ₹25.5 crore in 2026.