Executives have always been looked upon as easy targets, so to speak, by hackers. They have more privileges and more sensitive information with them than most of the other employees in a company. If compromised, the hacking of executives does more harm than a regular employee being hacked.
Having a secure password is one of the most crucial and fundamental security practices that everyone should follow. However, executives tend to have more, weaker and older passwords in use than other employees.
Regular security awareness training can help ensure that all executives are up-to-date with the latest active phishing attacks/viruses/malware/ransomware that are compromising businesses.
A number of simple rules and periodic audits can have a huge effect reducing the organisation's vulnerabilities.