{"id":"CVE-2020-20741","aliases":["EUVD-2020-13521","GHSA-rprh-9x53-mwjp"],"status":"published","title":"Incorrect Access Control in Beckhoff Automation GmbH \u0026 Co. KG CX9020 with firmware version...","description":"Incorrect Access Control in Beckhoff Automation GmbH \u0026 Co. KG CX9020 with firmware version CX9020_CB3011_WEC7_HPS_v602_TC31_B4016.6 allows remote attackers to bypass authentication via the \"CE Remote Display Tool\" as it does not close the incoming connection on the Windows CE side if the credentials are incorrect.","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":0.01561,"percentile":0.75457,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-07-23T19:25:46Z","modified":"2026-06-17T03:03:25Z","products":[{"vendor":"beckhoff","product":"cx9020"}],"references":[{"url":"https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2019-006.pdf","tags":["x_refsource_MISC","x_transferred","Mitigation","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-20741"},{"url":"https://github.com/advisories/GHSA-rprh-9x53-mwjp"}],"sources":{"cve":[{"id":"CVE-2020-20741","description":"Incorrect Access Control in Beckhoff Automation GmbH \u0026 Co. KG CX9020 with firmware version CX9020_CB3011_WEC7_HPS_v602_TC31_B4016.6 allows remote attackers to bypass authentication via the \"CE Remote Display Tool\" as it does not close the incoming connection on the Windows CE side if the credentials are incorrect.","status":"published","published":"2021-07-23T19:25:46Z","modified":"2024-08-04T14:22:25.395Z","updated_at":"2026-11-02T14:35:45.763329Z"}],"euvd":[{"id":"EUVD-2020-13521","description":"Incorrect Access Control in Beckhoff Automation GmbH \u0026 Co. KG CX9020 with firmware version CX9020_CB3011_WEC7_HPS_v602_TC31_B4016.6 allows remote attackers to bypass authentication via the \"CE Remote Display Tool\" as it does not close the incoming connection on the Windows CE side if the credentials are incorrect.","status":"published","published":"2021-07-23T19:25:46Z","modified":"2024-08-04T14:22:25Z","updated_at":"2026-11-03T03:07:24.233243Z"}],"ghsa":[{"id":"GHSA-rprh-9x53-mwjp","title":"Incorrect Access Control in Beckhoff Automation GmbH \u0026 Co. KG CX9020 with firmware version...","description":"Incorrect Access Control in Beckhoff Automation GmbH \u0026 Co. KG CX9020 with firmware version CX9020_CB3011_WEC7_HPS_v602_TC31_B4016.6 allows remote attackers to bypass authentication via the \"CE Remote Display Tool\" as it does not close the incoming connection on the Windows CE side if the credentials are incorrect.","status":"published","published":"2022-05-24T19:09:03Z","modified":"2023-01-30T05:00:57Z","updated_at":"2026-11-02T14:46:18.635114Z"}],"nvd":[{"id":"CVE-2020-20741","description":"Incorrect Access Control in Beckhoff Automation GmbH \u0026 Co. KG CX9020 with firmware version CX9020_CB3011_WEC7_HPS_v602_TC31_B4016.6 allows remote attackers to bypass authentication via the \"CE Remote Display Tool\" as it does not close the incoming connection on the Windows CE side if the credentials are incorrect.","status":"published","published":"2021-07-23T20:15:08.017Z","modified":"2026-06-17T03:03:25.02Z","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"}],"updated_at":"2026-11-02T14:06:44.292752Z"}]}}