Phishing and OAuth Token Vulnerabilities Lead to Full Microsoft 365 Breach

Phishing and OAuth Token Vulnerabilities Lead to Full Microsoft 365 Breach

Why This Matters Now: In late November 2023, a sophisticated phishing attack combined with OAuth token vulnerabilities resulted in a full Microsoft 365 breach affecting thousands of organizations. This incident highlights the critical importance of robust identity and access management (IAM) practices, especially in environments heavily reliant on cloud services. 🚨 Breaking: Thousands of Microsoft 365 accounts compromised due to phishing and OAuth token vulnerabilities. Immediate action required to secure your OAuth clients. 10K+Accounts Compromised 48hrsResponse Time Timeline of Events November 25, 2023 Initial phishing emails sent to targeted organizations. ...

Feb 06, 2026 · 4 min · 723 words · IAMDevBox