A digital representation of a cyber security breach involving banking data.
Technology

Navi Mumbai Cyberattack Exposes Alleged Data Theft Of 3.75 Lakh Bank Customers

Representative photo ยท Photo: This Now / Wikimedia Commons, CC BY-SA 4.0

By: NexVani DeskDate: 13 November 2026Views: 0

A major public sector bank's Global IT Centre in Navi Mumbai has reported a cyberattack, resulting in the alleged theft of 3.75 lakh customer records that were subsequently leaked on the dark web.

A significant cybersecurity breach has hit a leading public sector bank, with authorities investigating the alleged theft of data belonging to approximately 3.75 lakh customers. The incident occurred at the bank's Global IT Centre, located in Sector 11, CBD Belapur, Navi Mumbai. This facility serves as the bank's largest digital infrastructure hub in the country. Recent Navi Mumbai news reports indicate that unidentified hackers gained unauthorized entry into the centre's servers, compromising sensitive information before circulating it on the dark web.

Understanding the Navi Mumbai Cyberattack

According to police reports, the breach was initiated on October 9 at approximately 4:13 pm, when the intruders allegedly accessed the server using the identifier 'Siriusim'. By October 15, at around 6 pm, the perpetrators had successfully extracted critical data from two of the bank's primary digital applications, known as UNO 2.0 and RAAS. The incident was formally detected by bank officials on October 16, prompting an internal investigation that revealed the scale of the compromise.

Preliminary findings suggest the stolen data was contained within 32 CSV files, two JSON files, and 2,721 PDF files. Of the PDF documents, 2,063 were identified as unique hashed files, while the remainder were duplicates. Following the discovery, bank officials filed a formal complaint at the CBD Belapur police station. Law enforcement has since registered a case against unidentified suspects under various sections of the Bharatiya Nyaya Sanhita and the Information Technology Act, 2000.

Approximately 3.75 lakh customer records were stolen from a major bank's IT centre in Navi Mumbai.

Investigators are currently working to determine the exact nature of the compromised information and whether the leaked data has been misused. The police are also focusing on identifying the hacker network responsible for the intrusion. As the investigation continues, authorities are examining the extent of the breach to assess the potential impact on affected customers and the bank's broader digital operations.

Why it matters

The breach highlights the growing vulnerability of critical digital banking infrastructure to sophisticated cyber threats. For customers and the financial sector in India, this incident underscores the urgent need for enhanced security protocols to protect sensitive personal and financial information from unauthorized access.

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NexVani Desk

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