Banco Santander Data Breach History

This page tracks the Banco Santander data breach history and cybersecurity incidents affecting Banco Santander (Spain). BreachHistory currently indexes 2 publicly disclosed or catalogued incidents spanning 2014 through 2024, with approximately 30.0 million records reported as exposed across all indexed events. These totals may include overlapping datasets or third-party estimates and should not be interpreted as unique affected users.

The Banco Santander breach timeline includes major data breaches, cyber attacks, data leaks, credential exposures, API abuse, and other security incidents. Each incident provides details on the estimated records exposed, attack method, affected data types, and supporting public sources. Currently, 0 incidents are company-confirmed, while 1 remain unverified claims pending independent verification.

Largest Banco Santander Data Breaches

The largest indexed incidents include the 2024 Snowflake breach — 30M (ShinyHunters) and the 2014 — Banco Santander: employee improperly accessed and retained info…. Record counts originating from threat actors or leak sites should be treated as estimates unless confirmed by Banco Santander or a regulator. Below is the list of large data breaches:

• 2024 2024 Snowflake breach — 30M (ShinyHunters) — about 30.0M records exposed · Unverified claim
• 2014 2014 — Banco Santander: employee improperly accessed and retained info… — about 1 records exposed · Catalogued incident

What Information Was Exposed?

Depending on the incident, exposed data may include Social Security numbers and national IDs, names, bank account details, and other personal information (PII). The exact data varies between incidents, so review each breach page before assuming your information was affected.

Banco Santander Data Breach 2026

At the time of this update, no Banco Santander data breach has been catalogued for 2026. New incidents are added as official disclosures, regulatory filings, or credible cybersecurity reports become available.

What To Do If You Were Affected

If you believe your account may have been involved in a Banco Santander data breach, change any reused passwords, enable multi-factor authentication (MFA), monitor your account for suspicious activity, and be cautious of phishing emails or fake breach notifications.

This Banco Santander breach history is maintained by BreachHistory using public disclosures, regulatory filings, security research, and clearly labelled third-party claims. For the complete breach timeline, records exposed, incident details, and AI Breach Risk Score, explore the sections on this page.