ConnectWise Halts Cloud Services After Credential Theft Exposes 300+ Microsoft 365 Tenants
ConnectWise suspended its Cloud Backup, SaaS Security, and Cloud Management services after discovering that attackers exploited a compromised application credential to access over 300 Microsoft 365 tenants. The breach, detected on October 15, 2026, allowed unauthorized parties to read emails, files, and directory data. While ConnectWise states backup archives remain secure, attackers established persistent backdoors in some environments, requiring affected organizations to audit their configurations.