{"id":"CVE-2021-46686","aliases":["EUVD-2025-4863","GHSA-5mr4-h7fw-j3h9"],"status":"published","title":"Improper neutralization of special elements used in an OS command ('OS Command Injection') issue...","description":"Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in acmailer CGI ver.4.0.3 and earlier and acmailer DB ver.1.1.5 and earlier. If this vulnerability is exploited, an arbitrary OS command may be executed by an attacker.","severity":{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.01424,"percentile":0.73278,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-78"],"published":"2025-02-17T23:58:10Z","modified":"2026-06-17T04:15:23Z","products":[{"vendor":"extra innovation inc.","product":"acmailer cgi"},{"vendor":"extra innovation inc.","product":"acmailer db"}],"references":[{"url":"https://acmailer.jp/info/de.cgi?id=103"},{"url":"https://www.acmailer.jp/info/de.cgi?id=102"},{"url":"https://jvn.jp/en/jp/JVN96957439/"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-46686"},{"url":"https://jvn.jp/en/jp/JVN96957439"},{"url":"https://github.com/advisories/GHSA-5mr4-h7fw-j3h9"}],"sources":{"cve":[{"id":"CVE-2021-46686","description":"Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in acmailer CGI ver.4.0.3 and earlier and acmailer DB ver.1.1.5 and earlier. If this vulnerability is exploited, an arbitrary OS command may be executed by an attacker.","status":"published","published":"2025-02-17T23:58:10.727Z","modified":"2025-02-18T15:41:25.766Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:33:03.320536Z"}],"euvd":[{"id":"EUVD-2025-4863","description":"Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in acmailer CGI ver.4.0.3 and earlier and acmailer DB ver.1.1.5 and earlier. If this vulnerability is exploited, an arbitrary OS command may be executed by an attacker.","status":"published","published":"2025-02-17T23:58:10Z","modified":"2025-02-18T15:41:25Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T20:53:29.418558Z"}],"ghsa":[{"id":"GHSA-5mr4-h7fw-j3h9","title":"Improper neutralization of special elements used in an OS command ('OS Command Injection') issue...","description":"Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in acmailer CGI ver.4.0.3 and earlier and acmailer DB ver.1.1.5 and earlier. If this vulnerability is exploited, an arbitrary OS command may be executed by an attacker.","status":"published","published":"2025-02-18T00:31:42Z","modified":"2025-02-18T00:31:42Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:59:58.181327Z"}],"nvd":[{"id":"CVE-2021-46686","description":"Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in acmailer CGI ver.4.0.3 and earlier and acmailer DB ver.1.1.5 and earlier. If this vulnerability is exploited, an arbitrary OS command may be executed by an attacker.","status":"published","published":"2025-02-18T00:15:20.757Z","modified":"2026-06-17T04:15:23.46Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:07:08.629518Z"}]}}