Penetration Testing (Ethical Hacking)

Penetration testing (pentesting) is the authorized practice of simulating attacks on computer systems, networks, and applications to identify security weaknesses before malicious actors exploit them. Unlike passive vulnerability scanning, pentesters actively exploit vulnerabilities to prove impact and assess damage potential. Modern pentesting spans three domains: web application testing (OWASP Top 10 vulnerabilities), network/infrastructure testing (lateral movement, privilege escalation), and red team operations (advanced persistence, evasion, reporting business impact). In 2026, pentesting is table stakes for compliance (PCI-DSS, HIPAA, SOC 2) and a business necessity for any company handling sensitive data. Ethical hackers earn premiums because the alternative, data breach, is catastrophic: average breach cost is $4.5M (IBM 2025), making a $50k-$200k annual pentesting contract a risk-reduction bargain. Career scope: junior pentesters focus on web apps and vulnerability discovery; seniors handle network pivoting and multi-stage exploitation; red team leads design full attack campaigns and teach defensive teams to detect them.