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#10 CyberScoop general October 20, 2026 at 16:17 UTC

ConnectWise customers hit by supply-chain attack linked to compromised API secret

By Matt Kapko

AI Summary

A compromised API secret tied to ConnectWise's Cloud Backup service enabled attackers to authenticate into connected Microsoft 365 tenants, impacting hundreds of confirmed customers in a supply-chain-style attack against the managed service provider platform. ConnectWise responded by resetting credentials, replacing application keys, and taking Cloud Backup offline while the investigation continues. MSPs relying on ConnectWise for M365 backup should audit tenant access logs for unauthorized activity.

Relevance score: 76.0/100

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