{"cve":"CVE-2016-9499","nvd":{"published":"2018-07-13T20:29:02.003","modified":"2026-06-17T00:56:10.737","status":"Modified","description":"Accellion FTP server prior to version FTA_9_12_220 only returns the username in the server response if the username is invalid. An attacker may use this information to determine valid user accounts and enumerate them.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3},"cwes":["CWE-200","CWE-204"],"references":["https://www.kb.cert.org/vuls/id/745607","https://www.qualys.com/2016/12/06/qsa-2016-12-06/qsa-2016-12-06.pdf","https://www.securityfocus.com/bid/96154","https://www.kb.cert.org/vuls/id/745607","https://www.qualys.com/2016/12/06/qsa-2016-12-06/qsa-2016-12-06.pdf"],"products":["accellion:ftp_server"],"source":"nvd","synced_at":"2026-10-19T20:52:03.425131697+00:00"},"epss":{"cve":"CVE-2016-9499","score":0.07669,"percentile":0.94587,"date":"2026-10-31"},"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."]}