{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-3869", "assignerOrgId": "076d1eb6-cfab-4401-b34d-6dfc2a413bdb", "state": "PUBLISHED", "assignerShortName": "schneider", "dateReserved": "2026-03-10T08:36:56.944Z", "datePublished": "2026-09-11T15:13:18.079Z", "dateUpdated": "2026-09-11T19:14:45.128Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "076d1eb6-cfab-4401-b34d-6dfc2a413bdb", "shortName": "schneider", "dateUpdated": "2026-09-11T15:13:18.079Z" }, "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-303", "description": "CWE-303 Incorrect implementation of authentication algorithm", "type": "CWE" } ] } ], "affected": [ { "vendor": "Schneider Electric", "product": "Modicon M580", "versions": [ { "status": "affected", "version": "All versions with an application level below 4.00" } ], "defaultStatus": "unaffected" }, { "vendor": "Schneider Electric", "product": "Modicon M580 Safety", "versions": [ { "status": "affected", "version": "All versions with an application level below 4.20" } ], "defaultStatus": "unaffected" } ], "descriptions": [ { "lang": "en", "value": "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.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "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." } ] } ], "references": [ { "url": "https://download.se.com/files?p_Doc_Ref=SEVD-2026-251-04&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2026-251-04.pdf" } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV4_0": { "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "CRITICAL", "baseScore": 9.2, "vectorString": "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" } } ], "source": { "discovery": "UNKNOWN" }, "x_generator": { "engine": "Vulnogram 1.0.5" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-09-11T19:14:31.513263Z", "id": "CVE-2026-3869", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-11T19:14:45.128Z" } } ] } }