Cisco Certified Support Technician (CCST) CybersecurityVulnerability ManagementHard
A security team is analyzing a vulnerability report from a recent scan. One vulnerability has a Common Vulnerability Scoring System (CVSS) base score of 9.8 (Critical). However, the team knows that the affected system is isolated on a segmented network, has no direct internet access, and is only accessible by a few highly privileged administrators. How should the team interpret this CVSS score in the context of their specific environment?
- AThe vulnerability is less critical than the base score suggests due to compensating controls.
- BThe base score accurately reflects the immediate risk, regardless of environmental factors.
- CThe vulnerability should be remediated immediately, overriding all other priorities.
- DThe CVSS score is invalid because environmental factors were not considered during its calculation.
Show answer & explanationAnswer & explanation
Correct answer: A. The vulnerability is less critical than the base score suggests due to compensating controls.
The CVSS base score provides a standardized severity rating but does not account for an organization's specific environmental or temporal factors. Compensating controls like network segmentation and strict access controls can significantly reduce the actual risk, making the vulnerability less critical in that specific context.
Why the other options are wrong
- B. The base score is a general rating; it does not account for specific environmental factors, which can drastically alter the actual risk.
- C. While critical, the specific environmental context means it might not override *all* other priorities if the effective risk is much lower due to controls.
- D. The CVSS base score is valid for its intended purpose (general severity); environmental factors are considered in the 'Environmental' metric group, not the base score itself.
CVSS Environmental Score
A component of the Common Vulnerability Scoring System (CVSS) that measures the impact of a vulnerability based on the specific operational environment and implemented security controls.
- Adjusts the base score for an organization's unique context.
- Considers factors like compensatory controls, asset criticality, and security requirements.
- Provides a more accurate reflection of actual risk than the base score alone.
Memory trick: Base is General, Environment is Real.