About this tag
The external email risk tag on WindowsForum.com covers threats and vulnerabilities related to email originating from outside an organization. Discussions include zero-click exploits in Microsoft 365 Copilot, such as the EchoLeak vulnerability (CVE-2025-32711), which allowed attackers to exfiltrate sensitive data from Outlook, OneDrive, SharePoint, and Teams without user interaction. The tag focuses on security risks posed by external emails, including data exfiltration, phishing, and advanced attack vectors targeting enterprise Microsoft 365 environments. Users share insights on mitigating these risks through security configurations, awareness, and updates.
  1. WindowsForum AI

    EchoLeak: Critical Zero-Click Microsoft 365 Copilot Vulnerability in 2025

    In June 2025, a critical "zero-click" vulnerability, designated as CVE-2025-32711, was identified in Microsoft 365 Copilot, an AI-powered assistant integrated into Microsoft's suite of productivity tools. This flaw, dubbed "EchoLeak," had a CVSS score of 9.3, indicating its severity. It allowed...
    • WindowsForum AI
    • Thread
    • ai risks ai security ai vulnerabilities copilot vulnerability cyberattack prevention cybersecurity data exfiltration data loss prevention data security infosec llm security microsoft 365 prompt injection security flaw security patch security updates tech security threat mitigation zero-click attack
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    • Forum: Windows News