{"schemaVersion":3,"id":"CVE-2025-40566","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"A vulnerability has been identified in SIMATIC PCS neo V4.1 (All versions < V4.1 Update 3), SIMATIC PCS neo V5.0 (All versions < V5.0 Update 1). Affected products do not correctly invalidate user sessions upon user logout. This could allow a remote unauthenticated attacker, who has obtained the session token by other means, to re-use a legitimate user's session even after logout.","dates":{"published":"2025-05-13T09:38:52.993Z","modified":"2025-05-13T18:47:35.480Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.8,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","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:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":8.8,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","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:P/VC:H/VI:H/VA:H/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":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00458,"percentile":0.38334,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0.019000000000000006,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00439},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00458,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00458,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00458,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00458,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00458,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00458,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00458,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00458,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00458,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00458,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00458,"percentile":0.38334}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00439,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00458,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00458,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00458,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00458,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00458,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00458,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00458,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00458,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00458,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00458,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00458,"percentile":0.38334}]},"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-613","name":"Insufficient Session Expiration","description":"According to WASC, \"Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization.\"","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/613.html"}],"affected":[{"vendor":"siemens","product":"simatic_pcs_neo","name":"simatic pcs neo","label":"simatic_pcs_neo","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 4.1","noFixRecorded":false,"fixedIn":null},{"text":"< 5.0","noFixRecorded":false,"fixedIn":null},{"text":"4.1:update_1","noFixRecorded":false,"fixedIn":null},{"text":"4.1:update_2","noFixRecorded":false,"fixedIn":null},{"text":"5.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.1 | < 5.0 | 4.1:update_1 | 4.1:update_2 | 5.0","eol":null,"hubHref":"/vendor/siemens/simatic_pcs_neo"},{"vendor":"siemens","product":"simatic pcs neo v4.1","name":"SIMATIC PCS neo V4.1","label":"simatic pcs neo v4.1","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< V4.1 Update 3","noFixRecorded":false,"fixedIn":null}],"versionsText":"< V4.1 Update 3","eol":null,"hubHref":"/vendor/siemens/simatic_pcs_neo_v41"},{"vendor":"siemens","product":"simatic pcs neo v5.0","name":"SIMATIC PCS neo V5.0","label":"simatic pcs neo v5.0","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< V5.0 Update 1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< V5.0 Update 1","eol":null,"hubHref":"/vendor/siemens/simatic_pcs_neo_v50"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-339086.html","label":"cert-portal.siemens.com/productcert/html/ssa-339086.html","hostname":"cert-portal.siemens.com","tags":["Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2025-05-13T09:38:52.993Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-05-13T18:47:35.480Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T19:58:47.601Z","stale":false,"partial":false}}