{"id":"CVE-2021-33023","aliases":["EUVD-2021-19744","GHSA-qw3w-g5fj-98wc"],"status":"published","title":"Advantech WebAccess","description":"Advantech WebAccess versions 9.02 and prior are vulnerable to a heap-based buffer overflow, which may allow an attacker to remotely execute code.","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":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.02346,"percentile":0.8388,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122","CWE-787"],"published":"2021-10-18T12:41:08Z","modified":"2026-06-17T03:54:01Z","products":[{"vendor":"advantech","product":"webaccess"}],"references":[{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-285-02","tags":["x_refsource_MISC","x_transferred","Mitigation","Third Party Advisory","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33023"},{"url":"https://github.com/advisories/GHSA-qw3w-g5fj-98wc"}],"sources":{"cve":[{"id":"CVE-2021-33023","title":"Advantech WebAccess","description":"Advantech WebAccess versions 9.02 and prior are vulnerable to a heap-based buffer overflow, which may allow an attacker to remotely execute code.","status":"published","published":"2021-10-18T12:41:08.47Z","modified":"2024-09-17T03:49:19.278Z","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":"cna"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:33:10.555814Z"}],"euvd":[{"id":"EUVD-2021-19744","description":"Advantech WebAccess versions 9.02 and prior are vulnerable to a heap-based buffer overflow, which may allow an attacker to remotely execute code.","status":"published","published":"2021-10-18T12:41:08Z","modified":"2024-09-17T03:49:19Z","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":"2026-11-03T00:28:28.016201Z"}],"ghsa":[{"id":"GHSA-qw3w-g5fj-98wc","title":"Advantech WebAccess versions 9.02 and prior are vulnerable to a heap-based buffer overflow, which...","description":"Advantech WebAccess versions 9.02 and prior are vulnerable to a heap-based buffer overflow, which may allow an attacker to remotely execute code.","status":"published","published":"2022-05-24T19:17:50Z","modified":"2023-01-30T05:02:52Z","cwes":["CWE-122","CWE-787"],"updated_at":"2026-11-02T14:46:44.129156Z"}],"nvd":[{"id":"CVE-2021-33023","description":"Advantech WebAccess versions 9.02 and prior are vulnerable to a heap-based buffer overflow, which may allow an attacker to remotely execute code.","status":"published","published":"2021-10-18T13:15:09.437Z","modified":"2026-06-17T03:54:01.87Z","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":"secondary"},{"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-122","CWE-787"],"updated_at":"2026-11-02T14:06:59.689345Z"}]}}