Vulnerability detection is the process of identifying weaknesses in software, such as insecure logic, memory-safety bugs, exposed secrets, or flawed access control. It can be done manually during code review, with scanners and fuzzers, or with AI systems that look for suspicious patterns and risky code paths.
In cyber security, it matters because finding weaknesses early reduces the chance that attackers will discover and weaponize them first. Defenders use vulnerability detection to prioritize patching, harden applications, and validate security controls. Attackers and exploit researchers use the same skill to search for weaknesses that could lead to remote code execution, privilege escalation, or data theft. That is why the term is often considered dual-use: the same capability can strengthen defenses or lower the cost of offensive reconnaissance. Strong programs pair automated detection with human validation, because not every flagged issue is truly exploitable.