{"id":"CVE-2017-6028","aliases":["EUVD-2017-15096","GHSA-55h6-p6m7-f4h7"],"status":"published","title":"An Insufficiently Protected Credentials issue was discovered in Schneider Electric Modicon PLCs...","description":"An Insufficiently Protected Credentials issue was discovered in Schneider Electric Modicon PLCs Modicon M241, all firmware versions, and Modicon M251, all firmware versions. Log-in credentials are sent over the network with Base64 encoding leaving them susceptible to sniffing. Sniffed credentials could then be used to log into the web application.","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":0.0225,"percentile":0.8302,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-522"],"published":"2017-06-30T02:35:00Z","modified":"2026-06-17T01:21:39Z","products":[{"vendor":"schneider-electric","product":"modicon_m241_firmware"},{"vendor":"schneider-electric","product":"modicon_m251_firmware"}],"references":[{"url":"https://ics-cert.us-cert.gov/advisories/ICSA-17-089-02","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"http://www.securityfocus.com/bid/97254","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-6028"},{"url":"https://github.com/advisories/GHSA-55h6-p6m7-f4h7"}],"sources":{"cve":[{"id":"CVE-2017-6028","description":"An Insufficiently Protected Credentials issue was discovered in Schneider Electric Modicon PLCs Modicon M241, all firmware versions, and Modicon M251, all firmware versions. Log-in credentials are sent over the network with Base64 encoding leaving them susceptible to sniffing. Sniffed credentials could then be used to log into the web application.","status":"published","published":"2017-06-30T02:35:00Z","modified":"2024-08-05T15:18:49.367Z","cwes":["CWE-522"],"updated_at":"2026-11-02T14:33:16.916541Z"}],"euvd":[{"id":"EUVD-2017-15096","description":"An Insufficiently Protected Credentials issue was discovered in Schneider Electric Modicon PLCs Modicon M241, all firmware versions, and Modicon M251, all firmware versions. Log-in credentials are sent over the network with Base64 encoding leaving them susceptible to sniffing. Sniffed credentials could then be used to log into the web application.","status":"published","published":"2017-06-30T02:35:00Z","modified":"2024-08-05T15:18:49Z","updated_at":"2026-11-03T02:39:13.436112Z"}],"ghsa":[{"id":"GHSA-55h6-p6m7-f4h7","title":"An Insufficiently Protected Credentials issue was discovered in Schneider Electric Modicon PLCs...","description":"An Insufficiently Protected Credentials issue was discovered in Schneider Electric Modicon PLCs Modicon M241, all firmware versions, and Modicon M251, all firmware versions. Log-in credentials are sent over the network with Base64 encoding leaving them susceptible to sniffing. Sniffed credentials could then be used to log into the web application.","status":"published","published":"2022-05-13T01:04:04Z","modified":"2023-02-01T05:02:42Z","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-522"],"updated_at":"2026-11-02T14:49:57.319635Z"}],"nvd":[{"id":"CVE-2017-6028","description":"An Insufficiently Protected Credentials issue was discovered in Schneider Electric Modicon PLCs Modicon M241, all firmware versions, and Modicon M251, all firmware versions. Log-in credentials are sent over the network with Base64 encoding leaving them susceptible to sniffing. Sniffed credentials could then be used to log into the web application.","status":"published","published":"2017-06-30T03:29:00.36Z","modified":"2026-06-17T01:21:39.36Z","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":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-522"],"updated_at":"2026-11-02T14:03:51.893212Z"}]}}