{"id":"CVE-2019-16516","aliases":["EUVD-2019-7193","GHSA-j4v4-83w4-ph37"],"status":"published","title":"An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185....","description":"An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is a user enumeration vulnerability, allowing an unauthenticated attacker to determine with certainty if an account exists for a given username.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.19595,"percentile":0.97406,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-200","CWE-203"],"published":"2020-01-23T17:24:10Z","modified":"2026-06-17T02:22:20Z","exploits":[{"source":"pocgithub","id":"czz/ScreenConnect-UserEnum","title":"czz/ScreenConnect-UserEnum","date":"2021-12-17","url":"https://github.com/czz/ScreenConnect-UserEnum"},{"source":"exploitdb","id":"EDB-50618","title":"ConnectWise Control 19.2.24707 - Username Enumeration","type":"remote","platform":"multiple","date":"2022-01-05","url":"https://www.exploit-db.com/exploits/50618"}],"products":[{"vendor":"connectwise","product":"control"}],"references":[{"url":"https://know.bishopfox.com/advisories","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://know.bishopfox.com/advisories/connectwise-control","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://blog.huntresslabs.com/validating-the-bishop-fox-findings-in-connectwise-control-9155eec36a34","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://www.crn.com/news/managed-services/connectwise-control-msp-security-vulnerabilities-are-severe-bishop-fox","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://www.crn.com/slide-shows/managed-services/connectwise-control-attack-chain-exploit-20-questions-for-security-researcher-bishop-fox","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"http://packetstormsecurity.com/files/165432/ConnectWise-Control-19.2.24707-Username-Enumeration.html","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-16516"},{"url":"https://github.com/advisories/GHSA-j4v4-83w4-ph37"}],"sources":{"cve":[{"id":"CVE-2019-16516","description":"An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is a user enumeration vulnerability, allowing an unauthenticated attacker to determine with certainty if an account exists for a given username.","status":"published","published":"2020-01-23T17:24:10Z","modified":"2024-08-05T01:17:40.215Z","updated_at":"2026-11-02T14:32:23.189113Z"}],"euvd":[{"id":"EUVD-2019-7193","description":"An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is a user enumeration vulnerability, allowing an unauthenticated attacker to determine with certainty if an account exists for a given username.","status":"published","published":"2020-01-23T17:24:10Z","modified":"2024-08-05T01:17:40Z","updated_at":"2026-11-03T02:40:32.752495Z"}],"ghsa":[{"id":"GHSA-j4v4-83w4-ph37","title":"An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185....","description":"An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is a user enumeration vulnerability, allowing an unauthenticated attacker to determine with certainty if an account exists for a given username.","status":"published","published":"2022-05-24T17:07:11Z","modified":"2023-01-29T05:01:13Z","cwes":["CWE-200","CWE-203"],"updated_at":"2026-11-02T14:44:45.930691Z"}],"nvd":[{"id":"CVE-2019-16516","description":"An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is a user enumeration vulnerability, allowing an unauthenticated attacker to determine with certainty if an account exists for a given username.","status":"published","published":"2020-01-23T18:15:13.727Z","modified":"2026-06-17T02:22:20.69Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T14:05:42.416368Z"}]}}