{"id":"CVE-2017-6034","aliases":["EUVD-2017-15102","GHSA-m8hv-35c9-8jrx"],"status":"published","title":"Schneider Electric Modicon Modbus Protocol Authentication Bypass by Capture-replay","description":"An authentication bypass by capture-replay issue was discovered in Schneider Electric Modicon Modbus Protocol. Sensitive information is transmitted in cleartext in the Modicon Modbus protocol, which may allow an attacker to replay the following commands: run, stop, upload, and download.","severity":{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.056,"percentile":0.92955,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287","CWE-294"],"published":"2017-06-30T02:35:00Z","modified":"2026-06-17T01:21:40Z","products":[{"vendor":"schneider electric","product":"modicon modbus protocol"},{"vendor":"schneider electric software, llc","product":"modicon modbus protocol"},{"vendor":"schneider-electric","product":"modbus_firmware"}],"references":[{"url":"https://ics-cert.us-cert.gov/advisories/ICSA-17-101-01","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"http://www.securityfocus.com/bid/97562","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2017/icsa-17-101-01.json"},{"url":"https://www.se.com/us/en/download/document/SEVD-2017-065-01/"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-6034"},{"url":"https://www.se.com/us/en/download/document/SEVD-2017-065-01"},{"url":"https://github.com/advisories/GHSA-m8hv-35c9-8jrx"}],"sources":{"cve":[{"id":"CVE-2017-6034","title":"Schneider Electric Modicon Modbus Protocol Authentication Bypass by Capture-replay","description":"An authentication bypass by capture-replay issue was discovered in Schneider Electric Modicon Modbus Protocol. Sensitive information is transmitted in cleartext in the Modicon Modbus protocol, which may allow an attacker to replay the following commands: run, stop, upload, and download.","status":"published","published":"2017-06-30T02:35:00Z","modified":"2026-06-04T21:07:21.157Z","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-294"],"updated_at":"2026-11-02T14:33:16.916541Z"}],"euvd":[{"id":"EUVD-2017-15102","description":"An authentication bypass by capture-replay issue was discovered in Schneider Electric Modicon Modbus Protocol. Sensitive information is transmitted in cleartext in the Modicon Modbus protocol, which may allow an attacker to replay the following commands: run, stop, upload, and download.","status":"published","published":"2017-06-30T02:35:00Z","modified":"2026-06-04T21:07:21Z","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":"2026-11-02T18:20:52.744481Z"}],"ghsa":[{"id":"GHSA-m8hv-35c9-8jrx","title":"An Authentication Bypass by Capture-Replay issue was discovered in Schneider Electric Modicon...","description":"An Authentication Bypass by Capture-Replay issue was discovered in Schneider Electric Modicon Modbus Protocol. Sensitive information is transmitted in cleartext in the Modicon Modbus protocol, which may allow an attacker to replay the following commands: run, stop, upload, and download.","status":"published","published":"2022-05-13T01:36:35Z","modified":"2026-06-05T00:32:43Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-287","CWE-294"],"updated_at":"2026-11-02T15:08:33.700063Z"}],"nvd":[{"id":"CVE-2017-6034","description":"An authentication bypass by capture-replay issue was discovered in Schneider Electric Modicon Modbus Protocol. Sensitive information is transmitted in cleartext in the Modicon Modbus protocol, which may allow an attacker to replay the following commands: run, stop, upload, and download.","status":"published","published":"2017-06-30T03:29:00.453Z","modified":"2026-06-17T01:21:40.227Z","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":"secondary"},{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"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-294","CWE-287"],"updated_at":"2026-11-02T14:03:51.893212Z"}]}}