{"id":"CVE-2026-3869","aliases":["EUVD-2026-76132","GHSA-g6jw-g6wr-2qcc"],"status":"published","title":"CWE-303 : Incorrect Implementation of Authentication Algorithm vulnerability exists that could...","description":"CWE-303 : Incorrect Implementation of Authentication Algorithm vulnerability exists that could cause loss of confidentiality, integrity and availability of the PLC provided an application project with a lower application level is running on the PLC.","severity":{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00543,"percentile":0.45892,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-303"],"published":"2026-09-11T15:13:18Z","modified":"2026-09-18T19:30:42Z","products":[{"vendor":"schneider electric","product":"modicon m580"},{"vendor":"schneider electric","product":"modicon m580 safety"},{"vendor":"schneider electric se","product":"modicon m580"}],"references":[{"url":"https://download.se.com/files?p_Doc_Ref=SEVD-2026-251-04\u0026p_enDocType=Security+and+Safety+Notice\u0026p_File_Name=SEVD-2026-251-04.pdf"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3869"},{"url":"https://github.com/advisories/GHSA-g6jw-g6wr-2qcc"}],"sources":{"cve":[{"id":"CVE-2026-3869","description":"CWE-303 : Incorrect Implementation of Authentication Algorithm vulnerability exists that could cause loss of confidentiality, integrity and availability of the PLC provided an application project with a lower application level is running on the PLC.","status":"published","published":"2026-09-11T15:13:18.079Z","modified":"2026-09-11T19:14:45.128Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna"}],"cwes":["CWE-303"],"updated_at":"2026-11-02T13:49:09.229322Z"}],"euvd":[{"id":"EUVD-2026-76132","description":"CWE-303 : Incorrect Implementation of Authentication Algorithm vulnerability exists that could cause loss of confidentiality, integrity and availability of the PLC provided an application project with a lower application level is running on the PLC.","status":"published","published":"2026-09-11T15:13:18Z","modified":"2026-09-11T19:14:45Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"}],"updated_at":"2026-11-02T17:28:22.225258Z"}],"ghsa":[{"id":"GHSA-g6jw-g6wr-2qcc","title":"CWE-303 : Incorrect Implementation of Authentication Algorithm vulnerability exists that could...","description":"CWE-303 : Incorrect Implementation of Authentication Algorithm vulnerability exists that could cause loss of confidentiality, integrity and availability of the PLC provided an application project with a lower application level is running on the PLC.","status":"published","published":"2026-09-11T18:31:23Z","modified":"2026-09-11T18:31:24Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/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","level":"critical"}],"cwes":["CWE-303"],"updated_at":"2026-11-02T15:11:45.091927Z"}],"nvd":[{"id":"CVE-2026-3869","description":"CWE-303 : Incorrect Implementation of Authentication Algorithm vulnerability exists that could cause loss of confidentiality, integrity and availability of the PLC provided an application project with a lower application level is running on the PLC.","status":"published","published":"2026-09-11T16:17:06.2Z","modified":"2026-09-18T19:30:42.73Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/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","level":"critical","assessor":"secondary"}],"cwes":["CWE-303"],"updated_at":"2026-11-02T14:12:46.271848Z"}]}}