{"id":"CVE-2021-44158","aliases":["EUVD-2021-31008","GHSA-m8r5-j3fq-hx58"],"status":"published","title":"ASUS RT-AX56U Router - Stack-based buffer overflow","description":"ASUS RT-AX56U Wi-Fi Router is vulnerable to stack-based buffer overflow due to improper validation for httpd parameter length. An authenticated local area network attacker can launch arbitrary code execution to control the system or disrupt service.","severity":{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00699,"percentile":0.53581,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121","CWE-1284","CWE-787"],"published":"2022-01-03T10:10:18Z","modified":"2026-06-17T04:11:58Z","products":[{"vendor":"asus","product":"rt-ax56u"},{"vendor":"asus","product":"rt-ax56u_firmware"}],"references":[{"url":"https://www.twcert.org.tw/tw/cp-132-5431-d23be-1.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-44158"},{"url":"https://github.com/advisories/GHSA-m8r5-j3fq-hx58"}],"sources":{"cve":[{"id":"CVE-2021-44158","title":"ASUS RT-AX56U Router - Stack-based buffer overflow","description":"ASUS RT-AX56U Wi-Fi Router is vulnerable to stack-based buffer overflow due to improper validation for httpd parameter length. An authenticated local area network attacker can launch arbitrary code execution to control the system or disrupt service.","status":"published","published":"2022-01-03T10:10:18.551Z","modified":"2024-09-16T16:52:58.821Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:33:01.166399Z"}],"euvd":[{"id":"EUVD-2021-31008","description":"ASUS RT-AX56U Wi-Fi Router is vulnerable to stack-based buffer overflow due to improper validation for httpd parameter length. An authenticated local area network attacker can launch arbitrary code execution to control the system or disrupt service.","status":"published","published":"2022-01-03T10:10:18Z","modified":"2024-09-16T16:52:58Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T00:55:47.716817Z"}],"ghsa":[{"id":"GHSA-m8r5-j3fq-hx58","title":"ASUS RT-AX56U Wi-Fi Router is vulnerable to stack-based buffer overflow due to improper...","description":"ASUS RT-AX56U Wi-Fi Router is vulnerable to stack-based buffer overflow due to improper validation for httpd parameter length. An authenticated local area network attacker can launch arbitrary code execution to control the system or disrupt service.","status":"published","published":"2022-01-04T00:00:54Z","modified":"2023-06-27T23:07:43Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-121","CWE-787","CWE-1284"],"updated_at":"2026-11-02T14:54:39.385813Z"}],"nvd":[{"id":"CVE-2021-44158","description":"ASUS RT-AX56U Wi-Fi Router is vulnerable to stack-based buffer overflow due to improper validation for httpd parameter length. An authenticated local area network attacker can launch arbitrary code execution to control the system or disrupt service.","status":"published","published":"2022-01-03T10:15:08.19Z","modified":"2026-06-17T04:11:58.267Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.7,"vector":"AV:A/AC:L/Au:S/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-121","CWE-1284"],"updated_at":"2026-11-02T14:07:03.418194Z"}]}}