This is an OWL2 ontology that tries to unify the various threat and vulnerability data formats as a single and consistent ontology. It also provides tools for doing basic conversion to an RDF model using this ontology.
The core ontology that others depend on. core
An ontology describing the vulnerable platform. This is influenced by CPE. platform
An ontology for describing vulnerability metrics. Based on CVSS2 and CVSS3. score
A ontology for basic elements of vulnerabilities. Based on NVD. weakness
An ontology of weaknesses. Based on CWE. weakness
An ontology of computer security threat intelligence. Based on STIX and ATT&CK. CTI