{"id":"CVE-2018-3891","aliases":["EUVD-2018-15677","GHSA-2vx9-h65m-6rg8"],"status":"published","title":"An exploitable firmware downgrade vulnerability exists in the firmware update functionality of Yi...","description":"An exploitable firmware downgrade vulnerability exists in the firmware update functionality of Yi Home Camera 27US 1.8.7.0D. A specially crafted file can cause a logic flaw, resulting in a firmware downgrade. An attacker can insert an SD card to trigger this vulnerability.","severity":{"version":"3.0","score":5.7,"vector":"CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00402,"percentile":0.34685,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2018-11-02T17:00:00Z","modified":"2026-06-17T01:57:58Z","products":[{"vendor":"unknown","product":"yi technology"},{"vendor":"yi","product":"yi technology"},{"vendor":"yitechnology","product":"yi_home_camera_firmware"}],"references":[{"url":"https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0566","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-3891"},{"url":"https://github.com/advisories/GHSA-2vx9-h65m-6rg8"}],"sources":{"cve":[{"id":"CVE-2018-3891","description":"An exploitable firmware downgrade vulnerability exists in the firmware update functionality of Yi Home Camera 27US 1.8.7.0D. A specially crafted file can cause a logic flaw, resulting in a firmware downgrade. An attacker can insert an SD card to trigger this vulnerability.","status":"published","published":"2018-11-02T17:00:00Z","modified":"2024-08-05T04:57:24.455Z","cvss":[{"version":"3.0","score":5.7,"vector":"CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:35:05.619113Z"}],"euvd":[{"id":"EUVD-2018-15677","description":"An exploitable firmware downgrade vulnerability exists in the firmware update functionality of Yi Home Camera 27US 1.8.7.0D. A specially crafted file can cause a logic flaw, resulting in a firmware downgrade. An attacker can insert an SD card to trigger this vulnerability.","status":"published","published":"2018-11-02T17:00:00Z","modified":"2024-08-05T04:57:24Z","cvss":[{"version":"3.0","score":5.7,"vector":"CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"medium"}],"updated_at":"2026-11-03T02:40:15.208866Z"}],"ghsa":[{"id":"GHSA-2vx9-h65m-6rg8","title":"An exploitable firmware downgrade vulnerability exists in the firmware update functionality of Yi...","description":"An exploitable firmware downgrade vulnerability exists in the firmware update functionality of Yi Home Camera 27US 1.8.7.0D. A specially crafted file can cause a logic flaw, resulting in a firmware downgrade. An attacker can insert an SD card to trigger this vulnerability.","status":"published","published":"2022-05-13T01:02:01Z","modified":"2023-02-01T05:02:29Z","cvss":[{"version":"3.0","score":4.6,"vector":"CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:49:55.565803Z"}],"nvd":[{"id":"CVE-2018-3891","description":"An exploitable firmware downgrade vulnerability exists in the firmware update functionality of Yi Home Camera 27US 1.8.7.0D. A specially crafted file can cause a logic flaw, resulting in a firmware downgrade. An attacker can insert an SD card to trigger this vulnerability.","status":"published","published":"2018-11-02T17:29:00.287Z","modified":"2026-06-17T01:57:58.273Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"},{"version":"3.0","score":5.7,"vector":"CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"medium","assessor":"secondary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:N/I:P/A:N","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T14:04:47.196456Z"}]}}