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The Radio Access Network (RAN) is a critical part of every 5G deployment. It connects user equipment to the network and provides the access layer through which devices, applications, and enterprise systems communicate.
As organizations deploy private 5G for smart manufacturing, logistics, healthcare, energy, mining, ports, and other business-critical environments, securing the RAN becomes increasingly important.
A RAN vulnerability assessment helps organizations identify weaknesses in RAN architecture, configurations, software, interfaces, and security controls before they can become larger security issues.
This guide explains how a practical assessment can be structured and how it fits into a broader private 5G RAN security and RAN security testing program.
A RAN vulnerability assessment is a structured security review designed to identify weaknesses across the Radio Access Network.
Depending on the deployment, the assessment can examine:
The objective is to understand where vulnerabilities, misconfigurations, unnecessary exposure, or security-control gaps exist.
A vulnerability assessment generally focuses on identifying and analyzing weaknesses, while penetration testing goes further by validating whether selected weaknesses can actually be exploited under controlled conditions.
Private 5G networks often connect more than mobile devices.
A typical enterprise deployment may connect:
Devices → RAN → 5G Core → Edge/MEC → IT/OT → Enterprise Applications
This creates security dependencies across multiple environments.
A weakness in the RAN could therefore have implications beyond wireless connectivity. This makes private RAN security an important consideration for organizations using private cellular networks to support operational or business-critical workloads.
A proactive assessment can help organizations understand their exposure before scaling the network or connecting additional enterprise systems.
The assessment should begin with an understanding of the complete RAN architecture.
Security teams should identify:
The objective is to establish what needs protection and where potential attack paths exist.
This forms the foundation of 5G radio access network security.
gNB security should receive particular attention because the gNB is a major access point within the 5G network.
Assessment areas can include:
The assessment should identify weaknesses that could increase exposure or provide unauthorized access to network functions.
5G base station security extends beyond configuration checks.
Organizations should review whether base stations are properly hardened and whether unnecessary services, interfaces, accounts, or privileges are exposed.
Assessment activities can include:
This is particularly important for distributed private 5G environments where multiple RAN components may be deployed across enterprise locations.
5G radio security focuses on the wireless access layer.
The assessment should review the implementation and configuration of security mechanisms such as:
The objective is to determine whether intended protections are correctly implemented and consistently enforced.
RAN management interfaces can provide administrative control over network components.
Security teams should assess:
Management interfaces should be restricted to authorized users and systems and should not be unnecessarily exposed.
Modern RAN infrastructure relies heavily on software and firmware.
A vulnerability assessment should identify:
This helps organizations identify private 5G RAN vulnerabilities associated with outdated or vulnerable components.
Software security should also be reviewed whenever RAN functions are virtualized or implemented using cloud-native technologies.
The RAN should not be evaluated in isolation.
Communication between the RAN and 5G Core can introduce additional security considerations.
Assessment areas may include:
This helps establish whether the RAN has appropriate security boundaries between wireless access and core network resources.
Open RAN can introduce additional components, interfaces, software, and multi-vendor dependencies.
Therefore, Open RAN security should form part of the assessment when an organization uses a disaggregated RAN architecture.
Security teams should evaluate:
O-RAN security should focus not only on individual components but also on how those components interact.
A practical assessment can use the following checklist:
A RAN vulnerability assessment and RAN penetration testing have complementary purposes.
The assessment identifies potential weaknesses through activities such as:
RAN penetration testing uses controlled techniques to determine whether selected vulnerabilities can be practically exploited.
It may test:
A mature security program can use vulnerability assessment to identify weaknesses and penetration testing to validate the security impact of selected findings.
RAN security testing is broader than a single vulnerability assessment.
A practical lifecycle can be structured as:
Discover → Assess → Test → Remediate → Retest → Monitor
This approach allows organizations to identify weaknesses, validate important findings, implement remediation, and verify that security controls work as intended.
For enterprises operating private networks, recurring 5G RAN testing should also be considered after major architecture, software, configuration, or integration changes.
Matrix Shell provides RAN Security Testing across 2G, 3G, 4G, 5G, VoLTE, VoWiFi, and Open RAN environments, including validation of authentication, encryption, integrity protection, and traffic policies. Matrix Shell RAN Security Testing
Not every finding has the same operational significance.
Organizations can prioritize findings based on:
For private 5G, vulnerabilities affecting RAN components connected to critical IT, OT, IoT, or edge environments may require particular attention.
A practical private 5G RAN security program should:
A RAN vulnerability assessment provides organizations with a structured way to identify weaknesses across their 5G access infrastructure.
For private 5G RAN security, the assessment should cover the complete environment—from gNBs and 5G base station security to radio interfaces, management systems, software, RAN-to-Core communication, and connected enterprise infrastructure.
Where Open RAN is deployed, Open RAN security and O-RAN security should additionally address disaggregated components, interfaces, software, orchestration, and multi-vendor integration.
Combining vulnerability assessment with RAN penetration testing, continuous RAN security testing, remediation, and retesting gives enterprises a repeatable approach to improving RAN cybersecurity.
The goal is not simply to create a list of vulnerabilities. It is to understand the RAN attack surface, prioritize meaningful weaknesses, validate remediation, and maintain security as the private 5G environment evolves.
