Casco CVSS Calculator is a web-based tool for calculating Common Vulnerability Scoring System (CVSS) scores. The calculator allows users to input CVSS vector values through an interface that covers all eight base metrics defined in the CVSS framework. The tool evaluates Attack Vector (Network, Adjacent Network, Local, Physical), Attack Complexity (Low, High), Privileges Required (None, Low, High), User Interaction (None, Required), Scope (Unchanged, Changed), Confidentiality impact (None, Low, High), Integrity impact (None, Low, High), and Availability impact (None, Low, High). The calculator generates a numerical CVSS score and corresponding vector string based on the selected metric values. Users can share configurations via URL, enabling collaboration and documentation of vulnerability assessments. The tool includes automatic clipboard copying functionality for the generated CVSS vectors. The interface provides keyboard shortcuts for each metric option, allowing for rapid input and calculation. The calculator displays the severity rating alongside the numerical score, helping security teams quickly assess vulnerability criticality according to standardized CVSS methodology.