A comprehensive review of machine learning applications in cybersecurity: identifying gaps and advocating for cybersecurity auditing

Abstract The rapid growth of increasingly sophisticated and complex cyber threats has intensified interest in, and reliance on, artificial intelligence (AI), particularly machine learning (ML), within the cybersecurity landscape. ML has demonstrated robust potential to enhance cybersecurity capabilities, including threat detection, anomaly identification, predictive analytics, and automated response; however, practical ML implementation in cybersecurity remains in an early stage, often inconsistent, fragmented, and insufficiently developed. Consequently, ongoing research is essential to identify emerging developments, expand areas of inquiry, and propose improvements to existing approaches. This study provides a comprehensive review of recent ML applications in cybersecurity. Using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) methodology, the study systematically evaluates the feasibility, effectiveness, and limitations of current approaches. The review reveals several critical gaps, including narrow application scopes, suboptimal algorithm performance in real-world environments, insufficient and imbalanced datasets, and inadequa