{"id":"CVE-2020-9399","aliases":["EUVD-2020-30220","GHSA-w5vh-33ww-r5p2"],"status":"published","title":"The Avast AV parsing engine allows virus-detection bypass via a crafted ZIP archive. This affects...","description":"The Avast AV parsing engine allows virus-detection bypass via a crafted ZIP archive. This affects versions before 12 definitions 200114-0 of Antivirus Pro, Antivirus Pro Plus, and Antivirus for Linux.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01163,"percentile":0.67469,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-436","CWE-863"],"published":"2020-02-28T13:58:46Z","modified":"2026-06-17T03:27:52Z","products":[{"vendor":"avast","product":"antivirus_for_linux"},{"vendor":"avast","product":"antivirus_pro"},{"vendor":"avast","product":"antivirus_pro_plus"}],"references":[{"url":"https://blog.zoller.lu/p/tzo-23-2020-avast-generic-archive.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://seclists.org/fulldisclosure/2020/Feb/35","tags":["x_refsource_MISC","x_transferred","Mailing List","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-9399"},{"url":"https://github.com/advisories/GHSA-w5vh-33ww-r5p2"}],"sources":{"cve":[{"id":"CVE-2020-9399","description":"The Avast AV parsing engine allows virus-detection bypass via a crafted ZIP archive. This affects versions before 12 definitions 200114-0 of Antivirus Pro, Antivirus Pro Plus, and Antivirus for Linux.","status":"published","published":"2020-02-28T13:58:46Z","modified":"2024-08-04T10:26:16.087Z","updated_at":"2026-11-02T14:35:49.538427Z"}],"euvd":[{"id":"EUVD-2020-30220","description":"The Avast AV parsing engine allows virus-detection bypass via a crafted ZIP archive. This affects versions before 12 definitions 200114-0 of Antivirus Pro, Antivirus Pro Plus, and Antivirus for Linux.","status":"published","published":"2020-02-28T13:58:46Z","modified":"2024-08-04T10:26:16Z","updated_at":"2026-11-03T03:07:54.025234Z"}],"ghsa":[{"id":"GHSA-w5vh-33ww-r5p2","title":"The Avast AV parsing engine allows virus-detection bypass via a crafted ZIP archive. This affects...","description":"The Avast AV parsing engine allows virus-detection bypass via a crafted ZIP archive. This affects versions before 12 definitions 200114-0 of Antivirus Pro, Antivirus Pro Plus, and Antivirus for Linux.","status":"published","published":"2022-05-24T17:09:55Z","modified":"2023-01-29T05:01:38Z","cwes":["CWE-863"],"updated_at":"2026-11-02T14:44:52.661438Z"}],"nvd":[{"id":"CVE-2020-9399","description":"The Avast AV parsing engine allows virus-detection bypass via a crafted ZIP archive. This affects versions before 12 definitions 200114-0 of Antivirus Pro, Antivirus Pro Plus, and Antivirus for Linux.","status":"published","published":"2020-02-28T14:15:10.263Z","modified":"2026-06-17T03:27:52.777Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-436"],"updated_at":"2026-11-02T14:05:54.796125Z"}]}}