A key component of cybersecurity defense is effective information sharing, which promotes teamwork and quick reaction to emerging threats. However, putting strong information-sharing principles into practice might be difficult for practitioners. This summary paper explores cybersecurity specialists’ perceptions on information sharing during real-world international cybersecurity exercises (CDX) and looks at the barriers to the development of better information-sharing skills. The study intends to shed light on the difficulties faced by cybersecurity professionals and pinpoint areas where information-sharing procedures could be improved.