{"id":"CVE-2021-38397","aliases":["EUVD-2021-24849","GHSA-j77h-24p8-j3g2"],"status":"published","title":"Honeywell Experion PKS and ACE Controllers Unrestricted Upload of File with Dangerous Type","description":"Honeywell Experion PKS C200, C200E, C300, and ACE controllers are vulnerable to unrestricted file uploads, which may allow an attacker to remotely execute arbitrary code and cause a denial-of-service condition.","severity":{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01183,"percentile":0.68022,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-434"],"published":"2022-10-28T01:21:35Z","modified":"2026-06-17T04:02:01Z","products":[{"vendor":"honeywell","product":"application_control_environment_firmware"},{"vendor":"honeywell","product":"c200_firmware"},{"vendor":"honeywell","product":"c200e_firmware"},{"vendor":"honeywell","product":"c300_firmware"},{"vendor":"honeywell","product":"experion pks"}],"references":[{"url":"https://www.cisa.gov/uscert/ics/advisories/icsa-21-278-04","tags":["x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://www.honeywellprocess.com/library/support/notifications/Customer/SN2021-02-22-01-Experion-C300-CCL.pdf","tags":["x_transferred","Product"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-38397"},{"url":"https://github.com/advisories/GHSA-j77h-24p8-j3g2"}],"sources":{"cve":[{"id":"CVE-2021-38397","title":"Honeywell Experion PKS and ACE Controllers Unrestricted Upload of File with Dangerous Type","description":"Honeywell Experion PKS C200, C200E, C300, and ACE controllers are vulnerable to unrestricted file uploads, which may allow an attacker to remotely execute arbitrary code and cause a denial-of-service condition.","status":"published","published":"2022-10-28T01:21:35.576Z","modified":"2025-04-16T16:07:44.758Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:33:07.349244Z"}],"euvd":[{"id":"EUVD-2021-24849","description":"Honeywell Experion PKS C200, C200E, C300, and ACE controllers are vulnerable to unrestricted file uploads, which may allow an attacker to remotely execute arbitrary code and cause a denial-of-service condition.","status":"published","published":"2022-10-28T01:21:35Z","modified":"2025-04-16T16:07:44Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T20:52:24.837818Z"}],"ghsa":[{"id":"GHSA-j77h-24p8-j3g2","title":"Honeywell Experion PKS C200, C200E, C300, and ACE controllers are vulnerable to unrestricted file...","description":"Honeywell Experion PKS C200, C200E, C300, and ACE controllers are vulnerable to unrestricted file uploads, which may allow an attacker to remotely execute arbitrary code and cause a denial-of-service condition.","status":"published","published":"2022-10-28T12:00:34Z","modified":"2023-01-31T05:03:36Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:48:30.288341Z"}],"nvd":[{"id":"CVE-2021-38397","description":"Honeywell Experion PKS C200, C200E, C300, and ACE controllers are vulnerable to unrestricted file uploads, which may allow an attacker to remotely execute arbitrary code and cause a denial-of-service condition.","status":"published","published":"2022-10-28T02:15:16.953Z","modified":"2026-06-17T04:02:01.27Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:07:06.906968Z"}]}}