{"id":"CVE-2021-42090","aliases":["EUVD-2021-29076","GHSA-7qc3-f238-wf3x"],"status":"published","title":"An issue was discovered in Zammad before 4.1.1. The Form functionality allows remote code...","description":"An issue was discovered in Zammad before 4.1.1. The Form functionality allows remote code execution because deserialization is mishandled.","severity":{"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","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.02329,"percentile":0.83769,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-502"],"published":"2021-10-07T19:35:41Z","modified":"2026-10-24T10:30:33Z","products":[{"vendor":"zammad","product":"zammad"}],"references":[{"url":"https://zammad.com/en/advisories/zaa-2021-14","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-42090"},{"url":"https://github.com/advisories/GHSA-7qc3-f238-wf3x"}],"sources":{"cve":[{"id":"CVE-2021-42090","description":"An issue was discovered in Zammad before 4.1.1. The Form functionality allows remote code execution because deserialization is mishandled.","status":"published","published":"2021-10-07T19:35:41Z","modified":"2024-08-04T03:22:25.961Z","updated_at":"2026-11-02T14:32:58.739039Z"}],"euvd":[{"id":"EUVD-2021-29076","description":"An issue was discovered in Zammad before 4.1.1. The Form functionality allows remote code execution because deserialization is mishandled.","status":"published","published":"2021-10-07T19:35:41Z","modified":"2024-08-04T03:22:25Z","updated_at":"2026-11-03T03:24:16.784119Z"}],"ghsa":[{"id":"GHSA-7qc3-f238-wf3x","title":"An issue was discovered in Zammad before 4.1.1. The Form functionality allows remote code...","description":"An issue was discovered in Zammad before 4.1.1. The Form functionality allows remote code execution because deserialization is mishandled.","status":"published","published":"2022-05-24T19:16:51Z","modified":"2023-01-30T05:02:35Z","cwes":["CWE-502"],"updated_at":"2026-11-02T14:46:40.355653Z"}],"nvd":[{"id":"CVE-2021-42090","description":"An issue was discovered in Zammad before 4.1.1. The Form functionality allows remote code execution because deserialization is mishandled.","status":"published","published":"2021-10-07T21:15:07.673Z","modified":"2026-06-17T04:09:17.927Z","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","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:06:59.689345Z"}],"osv":[{"id":"CVE-2021-42090","description":"An issue was discovered in Zammad before 4.1.1. The Form functionality allows remote code execution because deserialization is mishandled.","status":"published","published":"2021-10-07T21:15:07.673Z","modified":"2026-10-24T10:30:33.098508142Z","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"}],"updated_at":"2026-11-02T15:44:21.557945Z"}]}}