What is exploit completed but no session was created?

An exploit is a piece of software, code, or sequence of commands that takes advantage of a vulnerability in a system or application. When an exploit is successfully executed, it typically results in the creation of a session, or a connection that allows the attacker to interact with the compromised system.

However, sometimes an exploit may be completed but no session is created. This can happen for several reasons:

1. The exploit may have been unsuccessful in exploiting the vulnerability. In this case, the attack may have been blocked by antivirus software, intrusion detection systems, or other security controls.

2. The exploit may have succeeded in compromising the system, but the attacker was unable to establish a session due to network or firewall restrictions. In such cases, the attacker may be able to exploit the same vulnerability in a different way.

3. The exploit may have succeeded in creating a session, but the attacker was unable to maintain the session due to the system's security settings or other factors.

In any case, the lack of a session does not necessarily mean that the exploit was unsuccessful or that the system is safe. Attackers may use other techniques such as keyloggers or backdoors to gain access to the system and exfiltrate data. Therefore, it is important for organizations to monitor their systems for signs of compromise and to have a robust incident response plan in place.