Morphisec researchers have unveiled a critical zero-click remote code execution (RCE) vulnerability in Microsoft Outlook, known as CVE-2024-38021. Unlike previous vulnerabilities, this flaw does not require authentication, making it extremely hazardous. This RCE vulnerability can be exploited without any user interaction, particularly from trusted senders, leading to severe consequences like data breaches and unauthorized access. Microsoft has labeled this vulnerability as “Important” but Morphisec has urged for a reevaluation to “Critical” due to its potential widespread impact. Although exploiting CVE-2024-38021 is more complex than a prior vulnerability, chaining it with other vulnerabilities could simplify the attack process and increase risk. Immediate mitigation measures like patch deployment, enhancing email security, and educating users are crucial to combat this threat. Microsoft's prompt release of a patch for CVE-2024-38021 underscores the urgency for organizations to take action and protect their systems from potential exploitation.