{"cve":"CVE-2020-3309","nvd":{"published":"2020-05-06T17:15:13.463","modified":"2026-06-17T03:17:55.787","status":"Modified","description":"A vulnerability in Cisco Firepower Device Manager (FDM) On-Box software could allow an authenticated, remote attacker to overwrite arbitrary files on the underlying operating system of an affected device. The vulnerability is due to improper input validation. An attacker could exploit this vulnerability by uploading a malicious file to an affected device. A successful exploit could allow the attacker to overwrite arbitrary files on as well as modify the underlying operating system of an affected device.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","score":7.2},"cwes":["CWE-787","CWE-20"],"references":["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fdmfo-HvPWKxDe","https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fdmfo-HvPWKxDe"],"products":["cisco:firepower_device_manager_on-box"],"source":"nvd","synced_at":"2026-10-19T21:04:18.695612450+00:00"},"epss":{"cve":"CVE-2020-3309","score":0.01766,"percentile":0.78071,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}