Mergers and acquisitions (M&A) expose companies to heightened cybersecurity risks as they integrate and expand their networks, increasing the potential attack surface for cybercriminals. A survey by the IBM Institute for Business Value found that over a third of executives experienced data breaches during M&A activities, highlighting the importance of robust security measures. Companies often face vulnerabilities due to unsecured networks, inadequate security controls, and unmaintained digital assets, making it crucial to implement strong External Attack Surface Management (EASM) strategies to safeguard data and systems. High-profile incidents involving Yahoo!, PayPal, and Google illustrate the potential consequences of insufficient cybersecurity during acquisitions. EASM involves inventorying digital assets and understanding their security risks, enabling better resource prioritization and decision-making. Tools like Detectify Surface Monitoring and Application Scanning utilize crowdsourced security insights to continuously monitor and detect vulnerabilities, helping companies protect their external attack surfaces and secure their merger or acquisition processes effectively.