{"id":"CVE-2023-39240","aliases":["EUVD-2023-42974","GHSA-pjc4-2x49-3j92"],"status":"published","title":"ASUS RT-AX55、RT-AX56U_V2 - Format String - 3","description":"It is identified a format string vulnerability in ASUS RT-AX56U V2’s iperf client function API. This vulnerability is caused by lacking validation for a specific value within its set_iperf3_cli.cgi module. A remote attacker with administrator privilege can exploit this vulnerability to perform remote arbitrary code execution, arbitrary system operation or disrupt service.","severity":{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.0128,"percentile":0.70219,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-134"],"published":"2023-09-07T07:25:32Z","modified":"2026-06-17T06:11:49Z","products":[{"vendor":"asus","product":"rt-ac86u_firmware"},{"vendor":"asus","product":"rt-ax55"},{"vendor":"asus","product":"rt-ax55_firmware"},{"vendor":"asus","product":"rt-ax56u_v2"},{"vendor":"asus","product":"rt-ax56u_v2_firmware"}],"references":[{"url":"https://www.twcert.org.tw/tw/cp-132-7356-021bf-1.html","tags":["x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-39240"},{"url":"https://github.com/advisories/GHSA-pjc4-2x49-3j92"}],"sources":{"cve":[{"id":"CVE-2023-39240","title":"ASUS RT-AX55、RT-AX56U_V2 - Format String - 3","description":"\nIt is identified a format string vulnerability in ASUS RT-AX56U V2’s iperf client function API. This vulnerability is caused by lacking validation for a specific value within its set_iperf3_cli.cgi module. A remote attacker with administrator privilege can exploit this vulnerability to perform remote arbitrary code execution, arbitrary system operation or disrupt service.\n\n","status":"published","published":"2023-09-07T07:25:32.504Z","modified":"2024-09-26T19:19:30.745Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-134"],"updated_at":"2026-11-02T14:35:33.138994Z"}],"euvd":[{"id":"EUVD-2023-42974","description":"\nIt is identified a format string vulnerability in ASUS RT-AX56U V2’s iperf client function API. This vulnerability is caused by lacking validation for a specific value within its set_iperf3_cli.cgi module. A remote attacker with administrator privilege can exploit this vulnerability to perform remote arbitrary code execution, arbitrary system operation or disrupt service.\n\n","status":"published","published":"2023-09-07T07:25:32Z","modified":"2024-09-26T19:19:30Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T00:28:07.565611Z"}],"ghsa":[{"id":"GHSA-pjc4-2x49-3j92","title":"\nIt is identified a format string vulnerability in ASUS RT-AX56U V2’s iperf client function API....","description":"\nIt is identified a format string vulnerability in ASUS RT-AX56U V2’s iperf client function API. This vulnerability is caused by lacking validation for a specific value within its set_iperf3_cli.cgi module. An unauthenticated remote attacker can exploit this vulnerability without privilege to perform remote arbitrary code execution, arbitrary system operation or disrupt service.\n\n","status":"published","published":"2023-09-07T09:30:15Z","modified":"2024-03-27T09:30:40Z","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-134"],"updated_at":"2026-11-02T14:55:43.592151Z"}],"nvd":[{"id":"CVE-2023-39240","description":"\nIt is identified a format string vulnerability in ASUS RT-AX56U V2’s iperf client function API. This vulnerability is caused by lacking validation for a specific value within its set_iperf3_cli.cgi module. A remote attacker with administrator privilege can exploit this vulnerability to perform remote arbitrary code execution, arbitrary system operation or disrupt service.\n\n","status":"published","published":"2023-09-07T08:15:07.71Z","modified":"2026-06-17T06:11:49.84Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-134"],"updated_at":"2026-11-02T14:08:28.268644Z"}]}}