OWASP Nettacker review
A broad open-source scanner for authorized reconnaissance and CVE checks.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
OWASP Nettacker is an open-source Python framework for automated penetration testing, information gathering, and vulnerability assessment. It is designed for security professionals, penetration testers, and ethical hackers conducting authorized internal or external assessments. The project scans IPv4 addresses, IPv4 ranges, IPv4 CIDR blocks, domains, and HTTP or HTTPS URLs, with deployment options spanning web, Windows, macOS, Linux, API, and self-hosted environments.
Its main strength is breadth within reconnaissance and vulnerability assessment. Nettacker combines port and service scanning, subdomain enumeration, vulnerability and CVE checks, directory and backup discovery, credential and brute-force modules, and support for multiple protocols. Multithreaded scanning, custom HTTP headers, and proxy support add control for varied assessment scenarios. Authenticated scanning is supported, while the command-line, REST API, and web interfaces give teams several ways to operate the framework. Reporting is available in HTML, JSON, CSV, and text formats, with scan history and report comparison for reviewing results over time.
Nettacker is a strong fit when an organization needs an open-source tool for targeted, authorized assessments and wants modular checks with flexible output. Its scope is less suitable for teams seeking verified continuous monitoring, compliance-focused coverage, or a broader integration ecosystem. Organizations prioritizing those capabilities should consider a vulnerability scanning product built around continuous scanning, compliance workflows, and native integrations. Teams comfortable operating an on-premises framework and interpreting reconnaissance and CVE findings will find Nettacker’s feature range more relevant than buyers looking for a managed, continuously operated service.
OWASP Nettacker pros and cons
- Where it wins
- Scans ports, services, subdomains, directories, and CVEs
- Supports IPv4, domains, HTTP/HTTPS URLs, and authenticated scanning
- Generates HTML, JSON, CSV, and text reports with comparison tools
- Where it doesn't
- Does not provide verified continuous scanning
- Lacks compliance coverage
- Does not list integrations beyond its REST API and web interface
OWASP Nettacker fact sheet, pricing and score →
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