{"id":"CVE-2017-2684","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-2684","generatedAt":"2026-10-28T23:56:27.115Z","title":"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.","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.","published":"2017-02-22T02:59:00.000Z","lastModified":"2026-06-17T01:16:40.000Z","status":"Modified","sourceIdentifier":"productcert@siemens.com","cvss":{"version":"3.0","score":9,"severity":"CRITICAL","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H"},"cwe":["CWE-592"],"affected":["siemens/simatic logon"],"epss":{"score":0.01987,"percentile":0.8051,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.99%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://www.securityfocus.com/bid/96208","tags":["Third Party Advisory","VDB Entry"],"source":"productcert@siemens.com"},{"url":"https://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-931064.pdf","tags":["Vendor Advisory"],"source":"productcert@siemens.com"},{"url":"http://www.securityfocus.com/bid/96208","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-931064.pdf","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-2684","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}