{"id":"CVE-2021-38408","aliases":["EUVD-2021-24860","GHSA-pc3j-ph7x-cxh4"],"status":"published","title":"A stack-based buffer overflow vulnerability in Advantech WebAccess Versions 9.02 and prior caused...","description":"A stack-based buffer overflow vulnerability in Advantech WebAccess Versions 9.02 and prior caused by a lack of proper validation of the length of user-supplied data may allow remote code execution.","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":"2026-11-11","score":0.11569,"percentile":0.96088,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121"],"published":"2021-09-09T11:24:58Z","modified":"2026-06-17T04:02:02Z","products":[{"vendor":"advantech","product":"advantech webaccess"},{"vendor":"advantech","product":"webaccess"}],"references":[{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-245-03","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-38408"},{"url":"https://github.com/advisories/GHSA-pc3j-ph7x-cxh4"}],"sources":{"cve":[{"id":"CVE-2021-38408","description":"A stack-based buffer overflow vulnerability in Advantech WebAccess Versions 9.02 and prior caused by a lack of proper validation of the length of user-supplied data may allow remote code execution.","status":"published","published":"2021-09-09T11:24:58Z","modified":"2024-08-04T01:37:16.572Z","cwes":["CWE-121"],"updated_at":"2026-11-02T14:33:07.349244Z"}],"euvd":[{"id":"EUVD-2021-24860","description":"A stack-based buffer overflow vulnerability in Advantech WebAccess Versions 9.02 and prior caused by a lack of proper validation of the length of user-supplied data may allow remote code execution.","status":"published","published":"2021-09-09T11:24:58Z","modified":"2024-08-04T01:37:16Z","updated_at":"2026-11-03T03:24:25.244479Z"}],"ghsa":[{"id":"GHSA-pc3j-ph7x-cxh4","title":"A stack-based buffer overflow vulnerability in Advantech WebAccess Versions 9.02 and prior caused...","description":"A stack-based buffer overflow vulnerability in Advantech WebAccess Versions 9.02 and prior caused by a lack of proper validation of the length of user-supplied data may allow remote code execution.","status":"published","published":"2022-05-24T19:14:03Z","modified":"2023-01-30T05:02:09Z","cwes":["CWE-121"],"updated_at":"2026-11-02T14:46:34.725436Z"}],"nvd":[{"id":"CVE-2021-38408","description":"A stack-based buffer overflow vulnerability in Advantech WebAccess Versions 9.02 and prior caused by a lack of proper validation of the length of user-supplied data may allow remote code execution.","status":"published","published":"2021-09-09T12:15:09.643Z","modified":"2026-06-17T04:02:02.61Z","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-121"],"updated_at":"2026-11-02T14:06:58.502206Z"}]}}