{"id":"CVE-2021-43928","aliases":["EUVD-2021-30790","GHSA-xcmm-3w7w-cqq9"],"status":"published","title":"Improper neutralization of special elements used in an OS command ('OS Command Injection')...","description":"Improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerability in mail sending and receiving component in Synology Mail Station before 20211105-10315 allows remote authenticated users to execute arbitrary commands via unspecified vectors.","severity":{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01865,"percentile":0.79466,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-78"],"published":"2022-02-07T02:15:26Z","modified":"2026-06-17T04:11:38Z","products":[{"vendor":"synology","product":"mail station"},{"vendor":"synology","product":"mail_station"}],"references":[{"url":"https://www.synology.com/security/advisory/Synology_SA_21_28","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43928"},{"url":"https://www.synology.com/security/advisory/Synology_SA_22_01"},{"url":"https://www.synology.com/en-us/security/advisory/Synology_SA_21_28"},{"url":"https://github.com/advisories/GHSA-xcmm-3w7w-cqq9"}],"sources":{"cve":[{"id":"CVE-2021-43928","description":"Improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerability in mail sending and receiving component in Synology Mail Station before 20211105-10315 allows remote authenticated users to execute arbitrary commands via unspecified vectors.","status":"published","published":"2022-02-07T02:15:26.417Z","modified":"2024-09-17T00:10:57.112Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:32:56.689433Z"}],"euvd":[{"id":"EUVD-2021-30790","description":"Improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerability in mail sending and receiving component in Synology Mail Station before 20211105-10315 allows remote authenticated users to execute arbitrary commands via unspecified vectors.","status":"published","published":"2022-02-07T02:15:26Z","modified":"2024-09-17T00:10:57Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T00:29:01.573177Z"}],"ghsa":[{"id":"GHSA-xcmm-3w7w-cqq9","title":"Improper neutralization of special elements used in an OS command ('OS Command Injection')...","description":"Improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerability in mail sending and receiving component in Synology Mail Station before 7.0.1-42218-2 allows remote authenticated users to execute arbitrary commands via unspecified vectors.","status":"published","published":"2022-02-08T00:00:30Z","modified":"2023-02-03T05:05:55Z","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":"2026-11-02T14:53:49.274652Z"}],"nvd":[{"id":"CVE-2021-43928","description":"Improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerability in mail sending and receiving component in Synology Mail Station before 20211105-10315 allows remote authenticated users to execute arbitrary commands via unspecified vectors.","status":"published","published":"2022-02-07T03:15:07.15Z","modified":"2026-06-17T04:11:38.597Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"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":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:07:04.178977Z"}]}}