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Desk note · industry · Banking / cybersecurity

A hacker claimed to leak thousands of alleged SBI customer records

Reporting on 20 October 2026 said a threat actor called Siriusim claimed to have published 375,000 CSV rows and 2,722 PDF documents with personal and loan-related details tied to State Bank of India customers; SBI had not publicly confirmed the leak and the authenticity of the data remained unverified.

20 Oct 2026 · 2 min read

Key takeaways

  • •CyberPulse56 flagged on X that Siriusim claimed on 16 October 2026 to have released customer documents allegedly linked to State Bank of India, including 375,000 CSV rows and 2,722 PDFs with loan and account-opening details, per coverage dated 20 October 2026.
  • •The report stressed that neither the bank nor independent auditors had verified the dataset at press time.
  • •The claim landed the same week CERT-In warned on 9 October 2026 about campaigns targeting NBFCs, payment firms, and APIs that move money using stolen partner-bank credentials.

What's going on here?

On 20 October 2026, Mint cited cybersecurity monitors who said a threat actor using the name Siriusim claimed to have leaked customer information tied to State Bank of India. The post, surfaced by the CyberPulse56 account on X, dated the alleged release to 16 October 2026. The claimed cache includes about 375,000 comma-separated rows and 2,722 PDF files with personal details, loan applications, supporting documents, addresses, and other onboarding paperwork. The actor described it as a first tranche and did not explain how the files were obtained. Reporters noted that the authenticity of the dump and any breach at SBI were unverified, and the bank had not issued a public confirmation by the time the story ran. The headline sits beside wider October warnings that Indian lenders and fintech partners face credential-theft attacks on payment APIs.

What does this mean?

Even unverified leak claims can trigger phishing waves if criminals reuse real-looking account numbers or old application forms. Banks typically investigate by matching sample records to internal logs, rotating API keys, and alerting regulators if personal data is confirmed exposed. Customers should treat unexpected loan-offer calls or KYC reset messages as suspicious until the bank publishes official guidance. For the sector, the episode adds pressure on state-run and private lenders to tighten vendor access, log retention, and breach disclosure timelines under India’s digital personal data rules.

Why should I care?

If you bank with SBI or recently applied for a loan there, watch only official SMS, app, and website notices before sharing OTPs or documents. Enable transaction alerts, change passwords if you reused them on third-party sites, and report unfamiliar credit inquiries. If you work at a lender or fintech, rerun API key reviews and partner-bank credential maps in light of CERT-In’s 9 October advisory. Track any SBI exchange or regulator statement, police cyber-cell updates, and whether CERT-In elevates the incident from social-media claim to confirmed breach.

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Disclaimer

For informational purposes only. Not investment advice. Verify with filings and a licensed adviser.