{"id":"CVE-2021-44827","aliases":["EUVD-2021-31631","GHSA-m37g-hc3h-jpg8"],"status":"published","title":"There is remote authenticated OS command injection on TP-Link Archer C20i 0.9.1 3.2 v003a.0 Build...","description":"There is remote authenticated OS command injection on TP-Link Archer C20i 0.9.1 3.2 v003a.0 Build 170221 Rel.55462n devices vie the X_TP_ExternalIPv6Address HTTP parameter, allowing a remote attacker to run arbitrary commands on the router with root privileges.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.53956,"percentile":0.99009,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-78"],"published":"2022-03-04T21:27:48Z","modified":"2026-06-17T04:12:51Z","exploits":[{"source":"pocgithub","id":"full-disclosure/CVE-2021-44827","title":"full-disclosure/CVE-2021-44827","date":"2021-12-13","url":"https://github.com/full-disclosure/CVE-2021-44827"}],"products":[{"vendor":"tp-link","product":"archer_c20i_firmware"}],"references":[{"url":"https://www.tp-link.com/us/security","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://Full-Disclosure.eu","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://full-disclosure.eu/reports/2022/CVE-2021-44827-tplink-authenticated-remote-code-execution.html","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-44827"},{"url":"https://github.com/advisories/GHSA-m37g-hc3h-jpg8"}],"sources":{"cve":[{"id":"CVE-2021-44827","description":"There is remote authenticated OS command injection on TP-Link Archer C20i 0.9.1 3.2 v003a.0 Build 170221 Rel.55462n devices vie the X_TP_ExternalIPv6Address HTTP parameter, allowing a remote attacker to run arbitrary commands on the router with root privileges.","status":"published","published":"2022-03-04T21:27:48Z","modified":"2024-08-04T04:32:13.206Z","updated_at":"2026-11-02T14:33:01.166399Z"}],"euvd":[{"id":"EUVD-2021-31631","description":"There is remote authenticated OS command injection on TP-Link Archer C20i 0.9.1 3.2 v003a.0 Build 170221 Rel.55462n devices vie the X_TP_ExternalIPv6Address HTTP parameter, allowing a remote attacker to run arbitrary commands on the router with root privileges.","status":"published","published":"2022-03-04T21:27:48Z","modified":"2024-08-04T04:32:13Z","updated_at":"2026-11-03T03:08:28.560815Z"}],"ghsa":[{"id":"GHSA-m37g-hc3h-jpg8","title":"There is remote authenticated OS command injection on TP-Link Archer C20i 0.9.1 3.2 v003a.0 Build...","description":"There is remote authenticated OS command injection on TP-Link Archer C20i 0.9.1 3.2 v003a.0 Build 170221 Rel.55462n devices vie the X_TP_ExternalIPv6Address HTTP parameter, allowing a remote attacker to run arbitrary commands on the router with root privileges.","status":"published","published":"2022-03-05T00:00:42Z","modified":"2023-02-03T05:06:30Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:53:54.776142Z"}],"nvd":[{"id":"CVE-2021-44827","description":"There is remote authenticated OS command injection on TP-Link Archer C20i 0.9.1 3.2 v003a.0 Build 170221 Rel.55462n devices vie the X_TP_ExternalIPv6Address HTTP parameter, allowing a remote attacker to run arbitrary commands on the router with root privileges.","status":"published","published":"2022-03-04T22:15:19.193Z","modified":"2026-06-17T04:12:51.647Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":9,"vector":"AV:N/AC:L/Au:S/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:07:05.198719Z"}]}}