{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-12T17:16:29.136","vulnerabilities":[{"cve":{"id":"CVE-2020-12820","sourceIdentifier":"psirt@fortinet.com","published":"2024-12-19T11:15:05.700","lastModified":"2025-01-21T20:42:17.767","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"Under non-default configuration, a stack-based buffer overflow in FortiOS version 6.0.10 and below, version 5.6.12 and below may allow a remote attacker authenticated to the SSL VPN to crash the FortiClient NAC daemon (fcnacd) and potentially execute arbitrary code via requesting a large FortiClient file name. We are not aware of proof of concept code successfully achieving the latter."},{"lang":"es","value":"En una configuración no predeterminada, un desbordamiento de búfer basado en pila en FortiOS versión 6.0.10 y anteriores, versión 5.6.12 y anteriores puede permitir que un atacante remoto autenticado en la VPN SSL bloquee el daemon NAC de FortiClient (fcnacd) y potencialmente ejecute código arbitrario mediante la solicitud de un nombre de archivo FortiClient grande. No tenemos conocimiento de ningún código de prueba de concepto que logre esto último con éxito."}],"metrics":{"cvssMetricV31":[{"source":"psirt@fortinet.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","baseScore":5.4,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"LOW"},"exploitabilityScore":2.8,"impactScore":2.5},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.9}]},"weaknesses":[{"source":"psirt@fortinet.com","type":"Secondary","description":[{"lang":"en","value":"CWE-121"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-787"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*","versionEndExcluding":"5.6.13","matchCriteriaId":"8C8DACBF-C9D5-4898-8294-DB887A28A9C7"},{"vulnerable":true,"criteria":"cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0.0","versionEndExcluding":"6.0.11","matchCriteriaId":"D44B5E8F-6093-4E84-9197-4530032E5B5A"}]}]}],"references":[{"url":"https://fortiguard.fortinet.com/psirt/FG-IR-20-083","source":"psirt@fortinet.com","tags":["Vendor Advisory"]}]}}]}