Fabian Hagg
Fabian Hagg is a dedicated security researcher with a focus on identifying and addressing vulnerabilities in enterprise systems. With strong expertise in cybersecurity, he has contributed to safeguarding critical business applications by conducting in-depth vulnerability research and improving security measures. Fabian’s technical skills and problem-solving approach make him a key asset in enhancing the resilience of organizational IT environments.
How to Detect and Fix the SAP NetWeaver Zero-Day: A Technical Recap
In Episode 1 of our new docuseries, Hacking & Defending SAP Applications Live, Onapsis researchers Ignacio Favro and Fabian Hagg analyzed the first mass-exploited SAP zero-day (CVE-2025-31324 and CVE-2025-42999). Sophisticated threat actors leveraged this previously unknown flaw to compromise hundreds of SAP customers. This article serves as a practitioner’s recap of that session, breaking down…
Securing SAP Remote Function Calls: The Crucial Role of S_ICF Authorization
Learn how the S_ICF authorization object in SAP ABAP systems enhances security by restricting access to RFC destinations, reducing the risk of lateral movement attacks. This guide explores the importance of fine-grained control in safeguarding sensitive data and protecting SAP landscapes from RFC hopping threats.