The Penetration Testing Execution Standard (PTES) describes a structured methodology for conducting penetration tests. The goal of the standard is to define the typical project phases of a penetration test and thereby create a transparent process from planning to reporting the results.
The standard emerged around 2010 as a community-driven initiative by security professionals. To this day, PTES is frequently referenced when discussing the general workflow of a penetration test. In practice, however, it is usually used more as a conceptual framework than as a complete technical methodology.
The PTES Phases
PTES divides a penetration test into seven typical project phases.
Pre-Engagement Interactions
In this phase, the organizational and legal framework of the engagement is defined. This includes in particular the scope, test objectives, communication channels, and the so-called rules of engagement.
Intelligence Gathering
This phase focuses on collecting information about the target environment. Examples include publicly available data, DNS information, subdomains, or indicators of the technologies in use.
Threat Modeling
Based on the collected information, potential attack scenarios are evaluated. The goal is to identify realistic attack paths and particularly critical systems.
Vulnerability Analysis
In this phase, potential vulnerabilities are identified. This is usually done through a combination of automated scans and manual analysis.
Exploitation
Identified vulnerabilities are then tested in practice. The objective is to determine whether and to what extent exploitation is possible.
Post-Exploitation
After successful access has been achieved, the potential impact is analyzed. This may include privilege escalation, access to sensitive data, or lateral movement within the network.
Reporting
At the end of the project, all findings are documented. The report describes the identified vulnerabilities, their potential impact, and possible remediation measures.
Taken together, these phases provide a meaningful structure for the workflow of a penetration testing project.
Critical Assessment
Despite its recognition, PTES is rarely used today as the sole methodological basis for penetration tests.
One important reason is the limited technical depth of the standard. While the defined phases describe the overall workflow of a penetration test, they provide only few concrete testing procedures. Additional technical guides and internal methodologies are therefore typically required for practical execution.
Another limitation is that the standard has seen only limited development since its original publication. Some technical examples in PTES refer to platforms and tools that are now outdated. For instance, older Windows versions such as Windows XP or Windows 7 are mentioned as reference systems in the technical sections.
Modern IT architectures are also barely addressed in the original PTES. Topics such as cloud infrastructures, containerized platforms, or complex identity systems play only a minor role in the standard.
Furthermore, PTES is not a formally maintained industry standard with clearly defined governance. There is no regular update process by a standardization body. As a result, the standard does not evolve over time and does not adequately reflect current technological developments.
