Telefónica security incident history
Hacking, data breaches and other security incidents involving Telefónica, with related coverage.
Telefónica internal system leak exposes sensitive data and network vulnerabilities
Impact: Sensitive internal system information and network vulnerabilities exposed
Data from Telefónica's internal systems was leaked by hackers, exposing sensitive information and network vulnerabilities. The date of the incident, the extent of the damage and the response have not been confirmed.
Read on Rescana ↗Telefónica investigates cyberattack after Peru data published
Impact: Millions of customers
After data related to Peru was published, Telefónica investigated a possible cyberattack. Millions of customers were reportedly affected, and the company said customers in Spain were not included.
Related reports: 2 →Telefónica internal ticketing system breached, customer data stolen
Impact: Theft of customer and ticket data and files
The internal ticketing system of Spain's Telefónica was breached, and customer and ticket data and files were stolen. Telefónica confirmed the system breach after the data leak. Subsequent analysis found that credentials stolen through infostealer infections of employees and social engineering techniques were used in the intrusion.
Related reports: 3 · last report →