STO security incident history
Hacking, data breaches and other security incidents involving STO, with related coverage.
Incidents: 1 · Most recent
Intrusion into STO's customer messaging system used to send smishing texts
Impact: Smishing texts sent to all customers
An outsider accessed STO's information network and used its customer messaging system to send all customers smishing texts disguised as traffic fine notices. The Korea Internet & Security Agency (KISA) confirmed that the app linked in the texts was a malicious app capable of stealing personal data and remotely controlling smartphones. The company apologised, reported the incident to KISA and requested a police investigation, and no leak of customer information was confirmed.
Related reports: 2 →