{"id":"CVE-2018-7791","aliases":["EUVD-2018-19503","GHSA-ppc6-q8hw-556j"],"status":"published","title":"A Permissions, Privileges, and Access Control vulnerability exists in Schneider Electric's...","description":"A Permissions, Privileges, and Access Control vulnerability exists in Schneider Electric's Modicon M221 product (all references, all versions prior to firmware V1.6.2.0). The vulnerability allows unauthorized users to overwrite the original password with their password. If an attacker exploits this vulnerability and overwrite the password, the attacker can upload the original program from the PLC.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01872,"percentile":0.7951,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-284","CWE-287"],"published":"2018-08-29T21:00:00Z","modified":"2026-06-17T02:03:44Z","products":[{"vendor":"schneider electric se","product":"modicon m221, all references, all versions prior to firmware v1.6.2.0"},{"vendor":"schneider-electric","product":"modicon_m221_firmware"}],"references":[{"url":"http://www.securityfocus.com/bid/105182","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://www.schneider-electric.com/en/download/document/SEVD-2018-235-01/","tags":["x_refsource_CONFIRM","x_transferred","Mitigation","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-7791"},{"url":"https://www.schneider-electric.com/en/download/document/SEVD-2018-235-01"},{"url":"https://github.com/advisories/GHSA-ppc6-q8hw-556j"}],"sources":{"cve":[{"id":"CVE-2018-7791","description":"A Permissions, Privileges, and Access Control vulnerability exists in Schneider Electric's Modicon M221 product (all references, all versions prior to firmware V1.6.2.0). The vulnerability allows unauthorized users to overwrite the original password with their password. If an attacker exploits this vulnerability and overwrite the password, the attacker can upload the original program from the PLC.","status":"published","published":"2018-08-29T21:00:00Z","modified":"2026-05-29T13:59:17.157Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:35:10.313768Z"}],"euvd":[{"id":"EUVD-2018-19503","description":"A Permissions, Privileges, and Access Control vulnerability exists in Schneider Electric's Modicon M221 product (all references, all versions prior to firmware V1.6.2.0). The vulnerability allows unauthorized users to overwrite the original password with their password. If an attacker exploits this vulnerability and overwrite the password, the attacker can upload the original program from the PLC.","status":"published","published":"2018-08-29T21:00:00Z","modified":"2026-05-29T13:59:17Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T18:21:01.215325Z"}],"ghsa":[{"id":"GHSA-ppc6-q8hw-556j","title":"A Permissions, Privileges, and Access Control vulnerability exists in Schneider Electric's...","description":"A Permissions, Privileges, and Access Control vulnerability exists in Schneider Electric's Modicon M221 product (all references, all versions prior to firmware V1.6.2.0). The vulnerability allows unauthorized users to overwrite the original password with their password. If an attacker exploits this vulnerability and overwrite the password, the attacker can upload the original program from the PLC.","status":"published","published":"2022-05-13T01:04:03Z","modified":"2026-05-29T15:31:24Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-284","CWE-287"],"updated_at":"2026-11-02T15:08:22.826978Z"}],"nvd":[{"id":"CVE-2018-7791","description":"A Permissions, Privileges, and Access Control vulnerability exists in Schneider Electric's Modicon M221 product (all references, all versions prior to firmware V1.6.2.0). The vulnerability allows unauthorized users to overwrite the original password with their password. If an attacker exploits this vulnerability and overwrite the password, the attacker can upload the original program from the PLC.","status":"published","published":"2018-08-29T21:29:01.18Z","modified":"2026-06-17T02:03:44.11Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-287","CWE-284"],"updated_at":"2026-11-02T14:04:36.842579Z"}]}}