{"id":"CVE-2017-2684","aliases":["EUVD-2017-11827","GHSA-h5v3-4rh5-mj9g"],"status":"published","title":"Siemens SIMATIC Logon prior to V1.5 SP3 Update 2 could allow an attacker with knowledge of a...","description":"Siemens SIMATIC Logon prior to V1.5 SP3 Update 2 could allow an attacker with knowledge of a valid user name, and physical or network access to the affected system, to bypass the application-level authentication.","severity":{"version":"3.0","score":9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.01987,"percentile":0.8073,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-592"],"published":"2017-02-22T02:00:00Z","modified":"2026-06-17T01:16:39Z","products":[{"vendor":"siemens","product":"simatic_logon"}],"references":[{"url":"http://www.securityfocus.com/bid/96208","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-931064.pdf","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-2684"},{"url":"https://github.com/advisories/GHSA-h5v3-4rh5-mj9g"}],"sources":{"cve":[{"id":"CVE-2017-2684","description":"Siemens SIMATIC Logon prior to V1.5 SP3 Update 2 could allow an attacker with knowledge of a valid user name, and physical or network access to the affected system, to bypass the application-level authentication.","status":"published","published":"2017-02-22T02:00:00Z","modified":"2024-08-05T14:02:07.219Z","cwes":["CWE-592"],"updated_at":"2026-11-02T14:33:15.543086Z"}],"euvd":[{"id":"EUVD-2017-11827","description":"Siemens SIMATIC Logon prior to V1.5 SP3 Update 2 could allow an attacker with knowledge of a valid user name, and physical or network access to the affected system, to bypass the application-level authentication.","status":"published","published":"2017-02-22T02:00:00Z","modified":"2024-08-05T14:02:07Z","updated_at":"2026-11-03T02:39:20.035866Z"}],"ghsa":[{"id":"GHSA-h5v3-4rh5-mj9g","title":"Siemens SIMATIC Logon prior to V1.5 SP3 Update 2 could allow an attacker with knowledge of a...","description":"Siemens SIMATIC Logon prior to V1.5 SP3 Update 2 could allow an attacker with knowledge of a valid user name, and physical or network access to the affected system, to bypass the application-level authentication.","status":"published","published":"2022-05-13T01:36:48Z","modified":"2023-02-01T05:09:03Z","cvss":[{"version":"3.0","score":9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T14:50:54.417127Z"}],"nvd":[{"id":"CVE-2017-2684","description":"Siemens SIMATIC Logon prior to V1.5 SP3 Update 2 could allow an attacker with knowledge of a valid user name, and physical or network access to the affected system, to bypass the application-level authentication.","status":"published","published":"2017-02-22T02:59:00.153Z","modified":"2026-06-17T01:16:39.757Z","cvss":[{"version":"3.0","score":9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-592"],"updated_at":"2026-11-02T14:03:43.325192Z"}]}}