Data breach reportedly targets India’s Kudankulam nuclear power plant

Purported blueprints of parts of India’s largest plant exposed by World Leaks ransomware group, Reuters reports.A data breach has reportedly revealed files linked to India’s largest nuclear power plant, according to the Reuters news agency.Ransomware group World Leaks posted ⁠⁠on the dark web a huge cache of files related to Kudankulam Nuclear Power Plant, including purported blueprints of parts of its facilities and supplier details – information it labelled as coming from Reliance Group, said Reuters on Thursday.Recommended Stories list of 3 itemslist 1 of 3India’s ethanol rush prompts anger among vehicle owners, questions for gov’tlist 2 of 3Indian activist Wangchuk urged to end hunger strike over exam paper leakslist 3 of 3India summons Iranian diplomat over missile killing of seafarerend of listThe India" class="entity-link entity-organization" data-entity-id="166321" data-entity-type="organization">Nuclear Power Corporation of India later said the data breach did not reveal any sensitive information related to nuclear security.Kudankulam in the southern Indian state of Tamil Nadu is the largest of India’s seven nuclear plants, and central to Prime Minister Narendra Modi’s ambitious plans to ⁠⁠expand atomic energy capacity.Indian businessman Anil Ambani’s Reliance Group, one of the plant’s contractors, told Reuters that there had been a “partial breach” of its data on a server hosted by third-party Indian data centre service provider Yotta, and that the government has been informed.Reliance did not disclose what data had been breached.Nearly 19,000 files totalling 14.3 gigabytes that appear for the search term “KKNP” – an acronym for the nuclear plant – in the data have been online since June 11 , according to independent cybersecurity researcher Rakesh Krishnan, who first alerted Reuters to the leak.Reuters reviewed the documents, which were dated from 2016 to mid-2025, but could not verify their authenticity.In addition to some blueprints and supplier details, they purportedly show meeting and inspection records, equipment reviews and insurance policies.