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ConnectWise suspends Cloud Backup service after attackers abuse its Microsoft 365 access

ID: a05d8529-754f-5de9-b6cf-cfb84c3e2f01

STIX ID: report--a05d8529-754f-5de9-b6cf-cfb84c3e2f01

Feed Name: Help Net Security

Threat Score
75/100

Date Published: 2026-10-19

Date Updated: 2026-10-19

Author: Zeljka Zorz

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ConnectWise disclosed that attackers used a compromised Cloud Backup (SkyKick) application credential to authenticate as an application identity across multiple Microsoft 365 tenants, enabling unauthorized access to customer environments; ConnectWise suspended Cloud Backup, SaaS Security and Cloud Management services, revoked affected credentials and certificates, and published remediation guidance while third-party forensics investigate confirmed access to at least 162 tenants and broader sign-in activity.

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