What is Command Injection in Cybersecurity?

Offensive Security
ByDecipherU Editorial
Version 1.0 · Published April 2026 · Last verified April 2026

An attack that executes arbitrary operating system commands on the host through a vulnerable application. It occurs when an application passes unsafe user input directly to a system shell. Successful command injection gives the attacker the same privileges as the application's service account.

Why Command Injection Matters for Your Cybersecurity Career

Command injection often leads directly to full server compromise, making it a top priority for cybersecurity professionals. Penetration testers test for command injection alongside SQL injection and XSS. Security engineers prevent it by avoiding shell calls and using strict input validation. OWASP ranks injection flaws as a perennial top-ten risk.

Which Cybersecurity Roles Use Command Injection?

Related Cybersecurity Terms

Related Cybersecurity Certifications

An attack that executes arbitrary operating system commands on the host through a vulnerable application. It occurs when an application passes unsafe user input directly to a system shell. Successful command injection gives the attacker the same privileges as the application's service account.

Command injection often leads directly to full server compromise, making it a top priority for cybersecurity professionals. Penetration testers test for command injection alongside SQL injection and XSS. Security engineers prevent it by avoiding shell calls and using strict input validation. OWASP ranks injection flaws as a perennial top-ten risk.

Cybersecurity professionals who work with Command Injection include Penetration Tester, Security Engineer, Security Architect. These roles apply Command Injection knowledge within the Offensive Security domain.

Last verified: April 2026?Report an inaccuracy

This role lives inside a packaged path

Want the curriculum, comp delta, and recommended courses for this role?

DecipherU bundles cybersecurity roles into a small set of packaged paths. Each path has the curriculum sequence, the compensation delta it unlocks, and the recommended courses, all pre-set. Two ways in: