• Unauthorized or External File Sharing – Seemingly innocuous file sharing
can inadvertently expose sensitive data. This risk escalates when users have
excessive permissions, allowing malicious actors to escalate their access
rights and potentially initiate significant data breaches.
• Administrative Accounts – These are significant vulnerabilities due to their
elevated privileges. A breach into one of these accounts can compromise
the entire M365 environment, granting attackers unrestricted access to
organizational data and resources.
• Internal Threats – Often arise from a lack of robust data protection policies
and training. Without clear guidelines, employees might inadvertently
mishandle sensitive data or neglect essential security practices, such as
regular software updates and multi-factor authentication.
• Stealth Techniques – Sophisticated attackers employ techniques to evade
detection, exploiting system vulnerabilities and compromised credentials. One
typical example is manipulating mailbox folder permissions to access sensitive
data without triggering security alerts.
• Interconnected Nature of M365 – Allows attackers to target associated
components, gaining persistent access to resources or data by hijacking
enterprise applications and app registrations.
Recognizing these vulnerabilities enables organizations to implement proactive
measures, ensuring that their M365 environment remains a bastion of
productivity rather than a gateway for security threats.
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