---
title: "China's AI agent hacked 2,250 Microsoft 365 tenants in hours; MFA didn't apply"
date: 2026-10-21
source: http://www.bing.com/news/apiclick.aspx?ref=FexRss&aid=&tid=6ad9afe7546c46a3abeae0dbfadd0c5f&url=https%3a%2f%2fwww.msn.com%2fen-us%2ftechnology%2fcybersecurity%2fchina-s-ai-agent-hacked-2-250-microsoft-365-tenants-in-hours-mfa-didn-t-apply%2far-AA2fNbXC&c=10011984588326241708&mkt=en-us
description: "China hackers agentic AI attack breached 2,250 Microsoft 365 tenants by exploiting a stolen ConnectWise Cloud Backup credential that bypassed MFA, Microsoft Threat Intelligence confirmed Wednesday, ..."
---

# China's AI agent hacked 2,250 Microsoft 365 tenants in hours; MFA didn't apply

China hackers agentic AI attack breached 2,250 Microsoft 365 tenants by exploiting a stolen ConnectWise Cloud Backup credential that bypassed MFA, Microsoft Threat Intelligence confirmed Wednesday, ...

*Published: 2026-10-21*