Hackers breach Microsoft 365 tenants via ConnectWise supply-chain attack

What happened

ConnectWise has shut down customer access to its Cloud Backup service (formerly SkyKick Cloud Backup) after hackers accessed application identities and compromised Microsoft 365 tenants. [...]

Why it matters

The incident may affect operational continuity, asset safety or trust around Microsoft. Watch for verified scope and remediation.

Affected entities

View evidence

2 reports · 1 original report · 2 independent

1. BleepingComputerPrimary source · Supports · EN · 62%
   Hackers breach Microsoft 365 tenants via ConnectWise supply-chain attack ↗Oct 17, 2026, 11:18 AM
2. The Hacker NewsIndependent · Supports · EN · 100%
   Hackers Use Compromised ConnectWise Credential to Sign In to 173 Microsoft 365 Tenants ↗Oct 17, 2026, 2:16 AM

Claims

• Hackers breach Microsoft 365 tenants via ConnectWise supply-chain attack Observed

Conflicts

No material conflict detected in the available evidence.

Timeline

1. October 17, 2026 at 2:16 AMFirst reported
2. Oct 17, 2026, 11:19 AMUnverified · 84/65%

Market move following event

Market reaction is not yet available for this asset and time window.

Score explanation