{"id":"CVE-2021-21968","aliases":["EUVD-2021-9139","GHSA-fmc6-6r82-9j7v"],"status":"published","title":"A file write vulnerability exists in the OTA update task functionality of Sealevel Systems, Inc....","description":"A file write vulnerability exists in the OTA update task functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted MQTT payload can lead to arbitrary file overwrite. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.","severity":{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00952,"percentile":0.61752,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2022-02-04T22:29:10Z","modified":"2026-06-17T03:36:28Z","products":[{"vendor":"sealevel","product":"seaconnect_370w_firmware"}],"references":[{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2021-1395","tags":["x_refsource_MISC","x_transferred","Exploit","Technical Description","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-21968"},{"url":"https://github.com/advisories/GHSA-fmc6-6r82-9j7v"}],"sources":{"cve":[{"id":"CVE-2021-21968","description":"A file write vulnerability exists in the OTA update task functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted MQTT payload can lead to arbitrary file overwrite. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.","status":"published","published":"2022-02-04T22:29:10Z","modified":"2025-04-15T19:10:23.114Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:33:00.488332Z"}],"euvd":[{"id":"EUVD-2021-9139","description":"A file write vulnerability exists in the OTA update task functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted MQTT payload can lead to arbitrary file overwrite. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.","status":"published","published":"2022-02-04T22:29:10Z","modified":"2025-04-15T19:10:23Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T20:52:26.772603Z"}],"ghsa":[{"id":"GHSA-fmc6-6r82-9j7v","title":"A file write vulnerability exists in the OTA update task functionality of Sealevel Systems, Inc....","description":"A file write vulnerability exists in the OTA update task functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted MQTT payload can lead to arbitrary file overwrite. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.","status":"published","published":"2022-02-10T00:00:44Z","modified":"2023-01-30T05:01:55Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:46:30.744651Z"}],"nvd":[{"id":"CVE-2021-21968","description":"A file write vulnerability exists in the OTA update task functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted MQTT payload can lead to arbitrary file overwrite. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.","status":"published","published":"2022-02-04T23:15:10.717Z","modified":"2026-06-17T03:36:28.153Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:07:04.178977Z"}]}}