{"id":"CVE-2021-20161","aliases":["EUVD-2021-7618","GHSA-mx5q-v692-hx4m"],"status":"published","title":"Trendnet AC2600 TEW-827DRU version 2.08B01 does not have sufficient protections for the UART...","description":"Trendnet AC2600 TEW-827DRU version 2.08B01 does not have sufficient protections for the UART functionality. A malicious actor with physical access to the device is able to connect to the UART port via a serial connection. No username or password is required and the user is given a root shell with full control of the device.","severity":{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00255,"percentile":0.17207,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287","CWE-306","CWE-326"],"published":"2021-12-30T21:31:09Z","modified":"2026-06-17T03:33:23Z","products":[{"vendor":"trendnet","product":"tew-827dru_firmware"}],"references":[{"url":"https://www.tenable.com/security/research/tra-2021-54","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20161"},{"url":"https://github.com/advisories/GHSA-mx5q-v692-hx4m"}],"sources":{"cve":[{"id":"CVE-2021-20161","description":"Trendnet AC2600 TEW-827DRU version 2.08B01 does not have sufficient protections for the UART functionality. A malicious actor with physical access to the device is able to connect to the UART port via a serial connection. No username or password is required and the user is given a root shell with full control of the device.","status":"published","published":"2021-12-30T21:31:09Z","modified":"2024-08-03T17:30:07.472Z","updated_at":"2026-11-02T14:32:55.564736Z"}],"euvd":[{"id":"EUVD-2021-7618","description":"Trendnet AC2600 TEW-827DRU version 2.08B01 does not have sufficient protections for the UART functionality. A malicious actor with physical access to the device is able to connect to the UART port via a serial connection. No username or password is required and the user is given a root shell with full control of the device.","status":"published","published":"2021-12-30T21:31:09Z","modified":"2024-08-03T17:30:07Z","updated_at":"2026-11-03T03:25:09.841069Z"}],"ghsa":[{"id":"GHSA-mx5q-v692-hx4m","title":"Trendnet AC2600 TEW-827DRU version 2.08B01 does not have sufficient protections for the UART...","description":"Trendnet AC2600 TEW-827DRU version 2.08B01 does not have sufficient protections for the UART functionality. A malicious actor with physical access to the device is able to connect to the UART port via a serial connection. No username or password is required and the user is given a root shell with full control of the device.","status":"published","published":"2021-12-31T00:00:29Z","modified":"2023-01-27T05:01:30Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"cwes":["CWE-326"],"updated_at":"2026-11-02T14:41:54.261914Z"}],"nvd":[{"id":"CVE-2021-20161","description":"Trendnet AC2600 TEW-827DRU version 2.08B01 does not have sufficient protections for the UART functionality. A malicious actor with physical access to the device is able to connect to the UART port via a serial connection. No username or password is required and the user is given a root shell with full control of the device.","status":"published","published":"2021-12-30T22:15:09.157Z","modified":"2026-06-17T03:33:23.627Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-287","CWE-306"],"updated_at":"2026-11-02T14:07:02.977492Z"}]}}