ScreenConnect Attacks Compromise ≥ 288 Endpoints in 48 Organizations via Rogue Remote‑Access Clients
A coordinated campaign leveraged malicious ScreenConnect extensions to gain remote access to at least 288 endpoints across 48 organizations. The incident highlights gaps in third‑party risk oversight and the need for continuous monitoring of remote‑access tool integrations.
ADTP Breach Watch· November 12, 2026· The Hacker News
SeverityHigh
Type👤 Breach
ConfidenceHigh
ReportedNov 12, 2026
Technology & SaaSManaged Service ProvidersInternal IT teams using remote‑access solutionsThird-Party DependencyData Exfiltration
Check if you use it. This incident came through a third party or the supply chain. If the product or supplier is in your estate or your vendors', start with the questions to ask below.
What happened
Attackers used rogue ScreenConnect client binaries delivered through compromised third‑party extensions, reaching 288 endpoints in 48 organizations; ConnectWise disabled the five affected extensions and launched a forensic investigation.
Why it matters for trust and compliance
The incident tests the control objective of third‑party risk management, showing that oversight of extensions is essential for audit readiness across frameworks.
Demonstrates need for continuous monitoring of third‑party extensions as evidence of control effectiveness.
Supports audit readiness by mapping extension‑oversight to vendor‑risk control objectives.
Who is affected
Managed Service ProvidersInternal IT teams using remote‑access solutions
Recommended actions
Inventory and verify all ScreenConnect extensions; remove unverified add‑ons.
Rotate partner credentials and enforce MFA for extension management.
Enable detailed remote‑session logging and integrate with a SIEM.
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