{"schemaVersion":3,"id":"CVE-2026-85114","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"A vulnerability has been identified in .NET Client Library for SIMATIC S7 Webserver API (All versions < V3.3.61). Affected applications do not properly validate filenames received from remote servers during ticket downloads.\n\nThis could allow an attacker who can manipulate the ticket response to write arbitrary files outside the intended download directory and, when overwriting is enabled, replace existing files accessible to the application.","dates":{"published":"2026-10-13T09:18:57.499Z","modified":"2026-10-16T21:41:27.171Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.7,"severity":"high","version":"4.0","versionLabel":"v4.0","source":"CVE.org","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":8.7,"severity":"high","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":8.7,"severity":"high","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00442,"percentile":0.36991,"severity":"low","asOf":"2026-10-18T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-14T00:00:00.000Z","score":0.00442,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00442,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00442,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00442,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00442,"percentile":0.36991}],"last30":[{"date":"2026-10-14T00:00:00.000Z","score":0.00442,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00442,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00442,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00442,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00442,"percentile":0.36991}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","description":"The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/22.html"}],"affected":[{"vendor":"siemens","product":".net client library for simatic s7 webserver api","name":".NET Client Library for SIMATIC S7 Webserver API","label":".net client library for simatic s7 webserver api","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< V3.3.61","noFixRecorded":false,"fixedIn":null}],"versionsText":"< V3.3.61","eol":null,"hubHref":"/vendor/siemens/net_client_library_for_simatic_s7_webserver_api"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-390352.html","label":"cert-portal.siemens.com/productcert/html/ssa-390352.html","hostname":"cert-portal.siemens.com","tags":[]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-13T09:18:57.499Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-16T21:41:27.171Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":35,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T02:34:02.315Z","stale":false,"partial":false}}