Why do organisations need both penetration testing and red teaming?

Why This Matters for Security Teams

penetration testing and red teaming are often grouped together, but they answer different operational questions. Pen testing asks what can be exploited within an approved scope and produces a fix-oriented finding list. Red teaming asks whether an adversary can achieve an objective and remain undetected long enough to matter. That distinction is critical when organisations are trying to improve both control strength and detection readiness under frameworks such as the NIST Cybersecurity Framework 2.0.

For NHI-heavy environments, the stakes are even higher because attackers do not need a human to click a link if they can abuse service accounts, API keys, or overprivileged automation. NHI Mgmt Group notes that 97% of NHIs carry excessive privileges and 80% of identity breaches involved compromised non-human identities, which makes both assurance testing and adversary simulation relevant to the same risk surface. The Ultimate Guide to NHIs frames this as a lifecycle problem, not a one-time audit issue. In practice, many security teams discover that a control that looks strong in a report still fails to slow a realistic attacker once chaining, privilege escalation, and detection gaps are tested end to end.

How It Works in Practice

Penetration testing and red teaming work best when they are designed to complement each other. A pen test is typically bounded by scope, rules of engagement, and a defined testing window. The goal is to identify exploitable weaknesses, validate exposure, and hand defenders a concrete remediation backlog. Red teaming is more objective-based: the team is asked to reach a target, such as data access or domain compromise, while avoiding detection and exercising the same paths a real adversary would use.

That difference changes the methods. Pen testing often emphasizes vulnerability discovery, authenticated checks, configuration review, and exploit validation. Red teaming emphasises tradecraft: initial access, persistence, privilege escalation, lateral movement, and evasion of monitoring. For modern identity-driven environments, both need to account for IAM misconfigurations, exposed secrets, weak service account hygiene, and gaps in logging. The NIST guidance on risk management and the security practices discussed in the Ultimate Guide to NHIs both support the same operational lesson: identity compromise is often the shortest path to impact.

• Use penetration testing to validate whether exposed services, auth flows, and secrets handling can be broken in scope.
• Use red teaming to test whether defenders detect tool chaining, privilege escalation, and anomalous identity use.
• Feed both exercises into the same remediation process so control fixes and detection fixes are tracked separately.
• Include service accounts, API keys, CI/CD tokens, and machine credentials in scope where they support business-critical workflows.

Red team outcomes also help reveal whether detections are tuned to the attacker’s actual path, not just to isolated alerts. These controls tend to break down when the environment changes faster than the test cadence, especially in cloud-native systems with frequent secret rotation, ephemeral workloads, and broad machine-to-machine trust.

Common Variations and Edge Cases

Tighter testing programmes often increase coordination overhead, requiring organisations to balance depth against operational disruption. That tradeoff is real: a full red team can stress monitoring and incident response, while a pen test can generate noise if scope is too broad or poorly defined.

Best practice is evolving for cloud, SaaS, and agentic AI environments. There is no universal standard for how often to run each exercise, but current guidance suggests aligning pen tests to material change events and using red teams for higher-risk scenarios where business impact depends on detection and response. In highly regulated environments, a compliance-driven pen test may satisfy assurance requirements, yet still fail to show whether an attacker could move laterally through token reuse, chained permissions, or unattended NHI credentials. The Schneider Electric credentials breach is a reminder that credential exposure can become an enterprise issue quickly when identity sprawl is not controlled.

For fast-changing environments, the best answer is usually not choosing one over the other. It is defining when control validation is enough, when adversary emulation is needed, and how both feed detection engineering, identity hardening, and executive risk decisions. In practice, many organisations learn this only after a control passes a test yet still fails to stop a realistic intrusion path.

Related resources from NHI Mgmt Group

• Why do AI systems need red teaming beyond traditional penetration testing?
• What breaks when AI red teaming is treated like traditional penetration testing?
• Why do AI red teaming and AI penetration testing both matter for production LLM apps?
• Should organisations choose continuous testing or point-in-time red teaming?