A vault compromise is a cybersecurity incident where an attacker gains unauthorized access to a digital vault, such as a password manager or secrets storage system. This breach allows the attacker to access, steal, or manipulate the entire set of stored credentials, secrets, and sensitive data. Vault compromises can occur due to weak master passwords, software vulnerabilities, phishing attacks, or insider threats. The impact is severe, as attackers may gain control over multiple accounts, systems, or services, leading to widespread data breaches, financial loss, and reputational damage. Preventing vault compromise requires strong authentication, regular software updates, and vigilant monitoring for suspicious activity.