{"cve":"CVE-2018-7846","nvd":{"published":"2019-05-22T20:29:01.667","modified":"2026-06-17T02:03:51.197","status":"Modified","description":"A CWE-501: Trust Boundary Violation vulnerability on connection to the Controller exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum and Modicon Premium which could cause unauthorized access by conducting a brute force attack on Modbus protocol to the controller.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-668"],"references":["https://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/","https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0735","https://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/","https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0735"],"products":["schneider-electric:modicon_m340_firmware","schneider-electric:modicon_m580_firmware","schneider-electric:modicon_premium_firmware","schneider-electric:modicon_quantum_firmware"],"source":"nvd","synced_at":"2026-10-19T20:56:19.218283075+00:00"},"epss":{"cve":"CVE-2018-7846","score":0.29575,"percentile":0.98189,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}