GIAC Exploit Researcher and Advanced Penetration Tester
GXPN is one of GIAC's most advanced offensive certifications, validating skills in exploit development, fuzzing, and bypassing modern exploit mitigations. It is aligned with the SANS SEC660 course and covers network attacks, crypto weaknesses, and both Windows and Linux exploitation. It sits well beyond the GPEN in depth and is aimed at senior penetration testers and exploit researchers.