Vulnerability analysis (or Vulnerability Assessment) is the systematic process of identifying, quantifying, and ranking security vulnerabilities within an IT infrastructure. Even before considering complex penetration testing, vulnerability scanning is a basic security hygiene measure: it allows for the detection of open doors before automated attackers can exploit them.
The Vulnerability Management Lifecycle
Vulnerability analysis is not a one-off audit, but a continuous process (Vulnerability Management) structured in several phases:
- Discovery and Mapping: Comprehensive identification of all connected assets (servers, workstations, routers, connected devices). You can only protect what you can see.
- Scan and Evaluation: The use of automated engines to query systems and compare their software versions and configurations with global databases of known vulnerabilities (CVEs – Common Vulnerabilities and Exposures).
- Prioritization: This is crucial. A scan can generate thousands of alerts. Standard scores (such as CVSS) must be used, combined with the company's context (a critical server exposed to the internet vs. an isolated test workstation), to define the priorities.
- Remediation and Mitigation: The deployment of security patches,the modification of configurations or, failing that, the network isolation of the vulnerable machine.
- Verification: A new targeted scan to confirm that the vulnerability is permanently patched.
Authenticated vs. Unauthenticated Scans
To obtain a complete view of the risks, the analysis tools operate according to two complementary approaches:
| Scan Type | Functioning | Main Objective |
| Unauthenticated | The scanner probes the network without identifiers, just as an external attacker or a computer worm would. | Map the exposed perimeter, check open ports and vulnerabilities in public services (Web, VPN). |
| Authenticated | The scanner connects to machines with administrator privileges. | Analyze in depth the registry, installed third-party software (Java, Adobe, browsers) and internal configuration flaws. |
Automation and continuous vulnerability analysis are now fundamental requirements imposed by regulatory frameworks, including the European NIS2 directive. At Onetosecure, we implement these continuous detection processes to filter out false positives and contextualize risks. We transform raw lists of technical vulnerabilities into clear remediation plans, allowing your teams to focus on the fixes that truly protect your operations.