Awareness / Email Opened
It may be a vulnerability for an email to be opened, as it is possible for malicious actors to send malicious emails with zero-day vulnerabilities for the mailing clients, which could compromise the user's security and privacy. In addition, phishing emails can be sent to trick the user into revealing confidential information.
Leaking information from an email can also be a potential vulnerability. If a malicious actor is able to gain access to a zero-day vulnerability or enable user-side tracking. Therefore, it is important to ensure that email software is regularly monitored for suspicious activity and is always up-to-date with the latest
It is usually impossible to prevent an email from being opened, so it is important to use up-to-date email software.