{"id":"CVE-2021-27661","aliases":["EUVD-2021-14407","GHSA-3fjw-3ffh-wrxh"],"status":"published","title":"Facility Explorer","description":"Successful exploitation of this vulnerability could give an authenticated Facility Explorer SNC Series Supervisory Controller (F4-SNC) user an unintended level of access to the controller’s file system, allowing them to access or modify system files by sending specifically crafted web messages to the F4-SNC.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00816,"percentile":0.57528,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-269","CWE-863"],"published":"2021-07-01T13:41:58Z","modified":"2026-06-17T03:45:18Z","products":[{"vendor":"johnson controls","product":"facility explorer snc series supervisory controllers (f4-snc)"},{"vendor":"johnsoncontrols","product":"f4-snc_firmware"}],"references":[{"url":"https://www.johnsoncontrols.com/cyber-solutions/security-advisories","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-182-01","tags":["third-party-advisory","x_refsource_CERT","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27661"},{"url":"https://us-cert.gov/ics/advisories"},{"url":"https://github.com/advisories/GHSA-3fjw-3ffh-wrxh"}],"sources":{"cve":[{"id":"CVE-2021-27661","title":"Facility Explorer","description":"Successful exploitation of this vulnerability could give an authenticated Facility Explorer SNC Series Supervisory Controller (F4-SNC) user an unintended level of access to the controller’s file system, allowing them to access or modify system files by sending specifically crafted web messages to the F4-SNC.","status":"published","published":"2021-07-01T13:41:58.835Z","modified":"2024-09-16T22:14:19.833Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:33:04.679189Z"}],"euvd":[{"id":"EUVD-2021-14407","description":"Successful exploitation of this vulnerability could give an authenticated Facility Explorer SNC Series Supervisory Controller (F4-SNC) user an unintended level of access to the controller’s file system, allowing them to access or modify system files by sending specifically crafted web messages to the F4-SNC.","status":"published","published":"2021-07-01T13:41:58Z","modified":"2024-09-16T22:14:19Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T00:55:04.822795Z"}],"ghsa":[{"id":"GHSA-3fjw-3ffh-wrxh","title":"Successful exploitation of this vulnerability could give an authenticated Facility Explorer SNC...","description":"Successful exploitation of this vulnerability could give an authenticated Facility Explorer SNC Series Supervisory Controller (F4-SNC) user an unintended level of access to the controller’s file system, allowing them to access or modify system files by sending specifically crafted web messages to the F4-SNC.","status":"published","published":"2022-05-24T22:28:07Z","modified":"2024-04-04T03:09:35Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-269","CWE-863"],"updated_at":"2026-11-02T14:56:13.784244Z"}],"nvd":[{"id":"CVE-2021-27661","description":"Successful exploitation of this vulnerability could give an authenticated Facility Explorer SNC Series Supervisory Controller (F4-SNC) user an unintended level of access to the controller’s file system, allowing them to access or modify system files by sending specifically crafted web messages to the F4-SNC.","status":"published","published":"2021-07-01T14:15:07.847Z","modified":"2026-06-17T03:45:18.94Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-269","CWE-863"],"updated_at":"2026-11-02T14:06:55.259633Z"}]}}