**Subject:** FBI Cyber Warning: Microsoft Outlook & OneDrive Under Active Attack
**Executive Summary:**
The FBI has issued an urgent flash alert targeting corporate users of Microsoft Outlook and OneDrive. The alert confirms that advanced persistent threat (APT) groups are exploiting previously unknown vulnerabilities to bypass multifactor authentication.
**Critical Impact:**
- Attackers gain full remote access to corporate email and cloud storage without triggering security alerts.
- Data exfiltration is happening in real-time; average dwell time before detection is under 48 hours.
- Targeted organizations include Fortune 500 firms, legal practices, and healthcare providers.
**Action Required:**
1. Immediate audit of all Outlook and OneDrive session tokens.
2. Enforce conditional access policies and disable legacy authentication protocols.
3. Contact the FBI Cyber Division for breach indicators.
**Bottom Line:** This is not a phishing drill. The attack vector is silent, automated, and corporate-grade. Your cloud data may already be compromised.