Instance takeover is a cybersecurity threat where an attacker gains unauthorized control over a running instance of a software system, application, or cloud service. This allows the attacker to perform malicious activities, such as stealing data, injecting malware, or disrupting services. Instance takeover can occur due to misconfigurations, weak authentication, or unpatched vulnerabilities. Preventing instance takeover involves enforcing strong access controls, regularly updating software, monitoring for suspicious activity, and following best security practices. Organizations utilizing cloud services or containerized environments are particularly at risk and should implement robust security measures to mitigate this threat.