Crypto exchange Gemini discloses third-party data breach. Cryptocurrency exchange Gemini is warning it suffered a data breach incident caused by a cyberattack at its Automated Clearing House (ACH) service provider, whose name was not disclosed. The American crypto exchange began sending notices to impacted individuals a month ago, on June 26, 2024 but submitted a sample of the letters yesterday to the Attorney General’s Office in California. According to the notification, Gemini suffered a third-party data breach when an unauthorized actor breached its vendor’s systems between June 3 and June 7, 2024. Third-party company: Not disclosed Automated Clearing House (ACH) service provider.