A critical vulnerability in Synology’s Active Backup for Microsoft 365 (ABM) has exposed sensitive data from Microsoft 365 tenants worldwide, potentially impacting over a million organizations relying on the popular backup solution. The flaw, tracked as CVE-2025-4679, allowed attackers to access confidential Microsoft 365 content—including Teams messages, group memberships, Outlook conversations, and calendar data—without requiring prior access to […]The post Synology ABM Vulnerability Leaks Microsoft 365 Sensitive Information appeared first on GBHackers Security | #1 Globally Trusted Cyber Security News Platform.