{"id":"CVE-2021-32980","aliases":["EUVD-2021-19701","GHSA-h8fg-8j3g-7p4x"],"status":"published","title":"Automation Direct CLICK PLC CPU Modules Authentication Bypass Using an Alternate Path or Channel","description":"Automation Direct CLICK PLC CPU Modules: C0-1x CPUs with firmware prior to v3.00 does not protect against additional software programming connections. An attacker can connect to the PLC while an existing connection is already active.","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":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01113,"percentile":0.66233,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287","CWE-288"],"published":"2022-04-04T19:45:52Z","modified":"2026-06-17T03:53:56Z","products":[{"vendor":"automation direct","product":"click plc cpu modules: c0-1x cpus"},{"vendor":"automationdirect","product":"c0-10are-d_firmware"},{"vendor":"automationdirect","product":"c0-10dd1e-d_firmware"},{"vendor":"automationdirect","product":"c0-10dd2e-d_firmware"},{"vendor":"automationdirect","product":"c0-10dre-d_firmware"},{"vendor":"automationdirect","product":"c0-11are-d_firmware"},{"vendor":"automationdirect","product":"c0-11dd1e-d_firmware"},{"vendor":"automationdirect","product":"c0-11dd2e-d_firmware"},{"vendor":"automationdirect","product":"c0-11dre-d_firmware"},{"vendor":"automationdirect","product":"c0-12are-1-d_firmware"},{"vendor":"automationdirect","product":"c0-12are-2-d_firmware"},{"vendor":"automationdirect","product":"c0-12are-d_firmware"},{"vendor":"automationdirect","product":"c0-12dd1e-1-d_firmware"},{"vendor":"automationdirect","product":"c0-12dd1e-2-d_firmware"},{"vendor":"automationdirect","product":"c0-12dd1e-d_firmware"},{"vendor":"automationdirect","product":"c0-12dd2e-1-d_firmware"},{"vendor":"automationdirect","product":"c0-12dd2e-2-d_firmware"},{"vendor":"automationdirect","product":"c0-12dd2e-d_firmware"},{"vendor":"automationdirect","product":"c0-12dre-1-d_firmware"},{"vendor":"automationdirect","product":"c0-12dre-2-d_firmware"},{"vendor":"automationdirect","product":"c0-12dre-d_firmware"}],"references":[{"url":"https://www.cisa.gov/uscert/ics/advisories/icsa-21-166-02","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-32980"},{"url":"https://github.com/advisories/GHSA-h8fg-8j3g-7p4x"}],"sources":{"cve":[{"id":"CVE-2021-32980","title":"Automation Direct CLICK PLC CPU Modules Authentication Bypass Using an Alternate Path or Channel","description":"Automation Direct CLICK PLC CPU Modules: C0-1x CPUs with firmware prior to v3.00 does not protect against additional software programming connections. An attacker can connect to the PLC while an existing connection is already active.","status":"published","published":"2022-04-04T19:45:52Z","modified":"2025-04-16T16:31:57Z","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":"cna"}],"cwes":["CWE-288"],"updated_at":"2026-11-02T14:33:07.014772Z"}],"euvd":[{"id":"EUVD-2021-19701","description":"Automation Direct CLICK PLC CPU Modules: C0-1x CPUs with firmware prior to v3.00 does not protect against additional software programming connections. An attacker can connect to the PLC while an existing connection is already active.","status":"published","published":"2022-04-04T19:45:52Z","modified":"2025-04-16T16:31:57Z","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":"2026-11-02T20:52:23.922531Z"}],"ghsa":[{"id":"GHSA-h8fg-8j3g-7p4x","title":"Automation Direct CLICK PLC CPU Modules: C0-1x CPUs with firmware prior to v3.00 does not protect...","description":"Automation Direct CLICK PLC CPU Modules: C0-1x CPUs with firmware prior to v3.00 does not protect against additional software programming connections. An attacker can connect to the PLC while an existing connection is already active.","status":"published","published":"2022-04-05T00:00:21Z","modified":"2023-01-27T05:01:18Z","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-287"],"updated_at":"2026-11-02T14:41:51.63425Z"}],"nvd":[{"id":"CVE-2021-32980","description":"Automation Direct CLICK PLC CPU Modules: C0-1x CPUs with firmware prior to v3.00 does not protect against additional software programming connections. An attacker can connect to the PLC while an existing connection is already active.","status":"published","published":"2022-04-04T20:15:08.94Z","modified":"2026-06-17T03:53:56.46Z","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":"3.1","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-288","CWE-287"],"updated_at":"2026-11-02T14:07:05.581807Z"}]}}