In the modern digital world, information security management, or ISM, is crucial for preventing cyberattacks, guaranteeing business continuity, and safeguarding sensitive data. The Foundations of Information Security Management offer an organized method for protecting IT systems, controlling threats, and putting security best practices into action inside a company. The CIA Triad, or confidentiality, integrity, and availability, are the three fundamental tenets that form the basis of information security. Availability guarantees that systems and data are still available when needed, Integrity protects data from unwanted changes, and Confidentiality guarantees that only authorized persons can access sensitive information. Risk assessment and management, which includes spotting possible dangers including malware, phishing, insider threats, and data breaches, is the first step in effective security management. In order to reduce risks and improve their security posture, organizations use security measures including firewalls, encryption, multi-factor authentication (MFA), and endpoint protection.Security governance and compliance are also important. To guarantee compliance with legal and regulatory obligations, many firms use international standards and frameworks including ISO 27001 Information Security Management, NIST Cybersecurity Framework, GDPR, and HIPAA. A strong security culture must be maintained by establishing security regulations, carrying out audits, and guaranteeing employee awareness through training. Information security management also includes disaster recovery planning and incident response. In order to limit downtime and prevent data loss, organizations need to build systems for detecting, responding to, and recovering from security incidents.