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Not every cloud breach starts with malware or a zero-day. In this incident, attackers discovered an exposed Spring Boot Actuator endpoint, harvested credentials from leaked configuration data, then used the OAuth2 Resource Owner Password Credentials (ROPC) flow to authenticate without MFA.

More from Trend Micro Research, News and Perspectives 18 Mar 2026, 1:00 p.m. 0-Day Breach Bypass Cloud Credentials Endpoint Security Exposure Incident Leak Malware MFA Misconfiguration Theft

AT&T Corp. disclosed today that a new data breach has exposed phone call and text message records for roughly 110 million people -- nearly all of its customers. AT&T said it delayed disclosing the incident in response to "national security and public safety concerns," noting that some of the records included data that could be used to determine where a call was made or text message sent. AT&T also acknowledged the customer records were exposed in a cloud database that was protected only by a username and password (no multi-factor authentication needed).

More from Krebs on Security 13 Jul 2024, 6:12 a.m. Authentication Breach Cloud Database Disclosure Exposure Incident MFA SMS Theft