Lior Aharonov ·
MFA never got a vote. A backup app's own secret opened Microsoft 365 tenants.
BleepingComputer reported on 17 October 2026 that ConnectWise shut customer access to its Cloud Backup service, formerly SkyKick, with no timeline for restoring it. Attackers signed in as the app itself and could reach mail, OneDrive, SharePoint and Teams data that customers had granted it. Huntress confirmed at least 162 compromised tenants in its environment.
If you use ConnectWise Cloud Backup or Cloud Management, review service principal sign-ins in Entra ID for the app, disable the apps, and remove secrets or certificates added since 13 October.
Every app you approve is a login that never sees MFA. Count them before an attacker does.
Lior Aharonov · my take