Hackers access Microsoft 365 tenants through ConnectWise service

Summary

ConnectWise has shut down customer access to its Cloud Backup service after hackers accessed application identities and compromised Microsoft 365 tenants, BleepingComputer reports. The Hacker News reports that unknown attackers used a compromised Microsoft 365 credential belonging to ConnectWise Cloud Backup to access 173 customer tenants.

Timeline

1. The Hacker News

   17 Oct 2026, 06:16 UTCSource ↗

   The Hacker News reports that unknown attackers used a compromised Microsoft 365 credential belonging to ConnectWise Cloud Backup to gain unauthorized access to 173 customer tenants.

2. BleepingComputer

   17 Oct 2026, 15:18 UTCSource ↗

   BleepingComputer reports that ConnectWise shut down customer access to its Cloud Backup service after hackers accessed application identities and compromised Microsoft 365 tenants.