{"id":"CVE-2020-6995","aliases":["EUVD-2020-28135","GHSA-xxpq-8gj6-wc56"],"status":"published","title":"In Moxa PT-7528 series firmware, Version 4.0 or lower, and PT-7828 series firmware, Version 3.9...","description":"In Moxa PT-7528 series firmware, Version 4.0 or lower, and PT-7828 series firmware, Version 3.9 or lower, the application utilizes weak password requirements, which may allow an attacker to gain unauthorized access.","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":"2026-11-10","score":0.01621,"percentile":0.76283,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-521"],"published":"2020-03-24T19:16:16Z","modified":"2026-06-17T03:24:05Z","products":[{"vendor":"moxa","product":"pt-7528-12msc-12tx-4gsfp-hv-hv_firmware"},{"vendor":"moxa","product":"pt-7528-12msc-12tx-4gsfp-hv_firmware"},{"vendor":"moxa","product":"pt-7528-12msc-12tx-4gsfp-wv-wv_firmware"},{"vendor":"moxa","product":"pt-7528-12msc-12tx-4gsfp-wv_firmware"},{"vendor":"moxa","product":"pt-7528-12mst-12tx-4gsfp-hv-hv_firmware"},{"vendor":"moxa","product":"pt-7528-12mst-12tx-4gsfp-hv_firmware"},{"vendor":"moxa","product":"pt-7528-12mst-12tx-4gsfp-wv-wv_firmware"},{"vendor":"moxa","product":"pt-7528-12mst-12tx-4gsfp-wv_firmware"},{"vendor":"moxa","product":"pt-7528-16msc-8tx-4gsfp-hv-hv_firmware"},{"vendor":"moxa","product":"pt-7528-16msc-8tx-4gsfp-hv_firmware"},{"vendor":"moxa","product":"pt-7528-16msc-8tx-4gsfp-wv-wv_firmware"},{"vendor":"moxa","product":"pt-7528-16msc-8tx-4gsfp-wv_firmware"},{"vendor":"moxa","product":"pt-7528-16mst-8tx-4gsfp-hv-hv_firmware"},{"vendor":"moxa","product":"pt-7528-16mst-8tx-4gsfp-hv_firmware"},{"vendor":"moxa","product":"pt-7528-16mst-8tx-4gsfp-wv-wv_firmware"},{"vendor":"moxa","product":"pt-7528-16mst-8tx-4gsfp-wv_firmware"},{"vendor":"moxa","product":"pt-7528-20msc-4tx-4gsfp-hv-hv_firmware"},{"vendor":"moxa","product":"pt-7528-20msc-4tx-4gsfp-hv_firmware"},{"vendor":"moxa","product":"pt-7528-20msc-4tx-4gsfp-wv-wv_firmware"},{"vendor":"moxa","product":"pt-7528-20msc-4tx-4gsfp-wv_firmware"},{"vendor":"moxa","product":"pt-7528-20mst-4tx-4gsfp-hv-hv_firmware"},{"vendor":"moxa","product":"pt-7528-20mst-4tx-4gsfp-hv_firmware"},{"vendor":"moxa","product":"pt-7528-20mst-4tx-4gsfp-wv-wv_firmware"},{"vendor":"moxa","product":"pt-7528-20mst-4tx-4gsfp-wv_firmware"},{"vendor":"moxa","product":"pt-7528-24tx-hv-hv_firmware"},{"vendor":"moxa","product":"pt-7528-24tx-hv_firmware"},{"vendor":"moxa","product":"pt-7528-24tx-wv-hv_firmware"},{"vendor":"moxa","product":"pt-7528-24tx-wv-wv_firmware"},{"vendor":"moxa","product":"pt-7528-24tx-wv_firmware"},{"vendor":"moxa","product":"pt-7528-8msc-16tx-4gsfp-hv-hv_firmware"},{"vendor":"moxa","product":"pt-7528-8msc-16tx-4gsfp-hv_firmware"},{"vendor":"moxa","product":"pt-7528-8msc-16tx-4gsfp-wv-wv_firmware"},{"vendor":"moxa","product":"pt-7528-8msc-16tx-4gsfp-wv_firmware"},{"vendor":"moxa","product":"pt-7528-8mst-16tx-4gsfp-hv-hv_firmware"},{"vendor":"moxa","product":"pt-7528-8mst-16tx-4gsfp-hv_firmware"},{"vendor":"moxa","product":"pt-7528-8mst-16tx-4gsfp-wv-wv_firmware"},{"vendor":"moxa","product":"pt-7528-8mst-16tx-4gsfp-wv_firmware"},{"vendor":"moxa","product":"pt-7528-8ssc-16tx-4gsfp-hv-hv_firmware"},{"vendor":"moxa","product":"pt-7528-8ssc-16tx-4gsfp-wv-wv_firmware"},{"vendor":"moxa","product":"pt-7828-f-24-24_firmware"},{"vendor":"moxa","product":"pt-7828-f-24-hv_firmware"},{"vendor":"moxa","product":"pt-7828-f-24_firmware"},{"vendor":"moxa","product":"pt-7828-f-48-48_firmware"},{"vendor":"moxa","product":"pt-7828-f-48-hv_firmware"},{"vendor":"moxa","product":"pt-7828-f-48_firmware"},{"vendor":"moxa","product":"pt-7828-f-hv-hv_firmware"},{"vendor":"moxa","product":"pt-7828-f-hv_firmware"},{"vendor":"moxa","product":"pt-7828-r-24-24_firmware"},{"vendor":"moxa","product":"pt-7828-r-24-hv_firmware"},{"vendor":"moxa","product":"pt-7828-r-24_firmware"},{"vendor":"moxa","product":"pt-7828-r-48-48_firmware"},{"vendor":"moxa","product":"pt-7828-r-48-hv_firmware"},{"vendor":"moxa","product":"pt-7828-r-48_firmware"},{"vendor":"moxa","product":"pt-7828-r-hv-hv_firmware"},{"vendor":"moxa","product":"pt-7828-r-hv_firmware"}],"references":[{"url":"https://www.us-cert.gov/ics/advisories/icsa-20-056-03","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-6995"},{"url":"https://github.com/advisories/GHSA-xxpq-8gj6-wc56"}],"sources":{"cve":[{"id":"CVE-2020-6995","description":"In Moxa PT-7528 series firmware, Version 4.0 or lower, and PT-7828 series firmware, Version 3.9 or lower, the application utilizes weak password requirements, which may allow an attacker to gain unauthorized access.","status":"published","published":"2020-03-24T19:16:16Z","modified":"2024-08-04T09:18:03.026Z","cwes":["CWE-521"],"updated_at":"2026-11-02T14:35:52.592504Z"}],"euvd":[{"id":"EUVD-2020-28135","description":"In Moxa PT-7528 series firmware, Version 4.0 or lower, and PT-7828 series firmware, Version 3.9 or lower, the application utilizes weak password requirements, which may allow an attacker to gain unauthorized access.","status":"published","published":"2020-03-24T19:16:16Z","modified":"2024-08-04T09:18:03Z","updated_at":"2026-11-03T03:08:01.029528Z"}],"ghsa":[{"id":"GHSA-xxpq-8gj6-wc56","title":"In Moxa PT-7528 series firmware, Version 4.0 or lower, and PT-7828 series firmware, Version 3.9...","description":"In Moxa PT-7528 series firmware, Version 4.0 or lower, and PT-7828 series firmware, Version 3.9 or lower, the application utilizes weak password requirements, which may allow an attacker to gain unauthorized access.","status":"published","published":"2022-05-24T17:12:36Z","modified":"2023-01-29T05:02:12Z","updated_at":"2026-11-02T14:45:01.015636Z"}],"nvd":[{"id":"CVE-2020-6995","description":"In Moxa PT-7528 series firmware, Version 4.0 or lower, and PT-7828 series firmware, Version 3.9 or lower, the application utilizes weak password requirements, which may allow an attacker to gain unauthorized access.","status":"published","published":"2020-03-24T20:15:15.1Z","modified":"2026-06-17T03:24:05.38Z","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":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-521"],"updated_at":"2026-11-02T14:05:56.580228Z"}]}}