{"id":"CVE-2020-29563","aliases":["EUVD-2020-21926","GHSA-r839-hvfq-837f"],"status":"published","title":"An issue was discovered on Western Digital My Cloud OS 5 devices before 5.07.118. A NAS Admin...","description":"An issue was discovered on Western Digital My Cloud OS 5 devices before 5.07.118. A NAS Admin authentication bypass vulnerability could allow an unauthenticated user to gain access to the device.","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":"2026-11-10","score":0.02922,"percentile":0.87155,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287"],"published":"2020-12-11T23:50:01Z","modified":"2026-06-17T03:11:26Z","products":[{"vendor":"westerndigital","product":"my_cloud_os_5"}],"references":[{"url":"https://www.westerndigital.com/support/productsecurity/wdc-20010-my-cloud-os5-firmware-5-07-118","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-20-1446/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-29563"},{"url":"https://github.com/advisories/GHSA-r839-hvfq-837f"}],"sources":{"cve":[{"id":"CVE-2020-29563","description":"An issue was discovered on Western Digital My Cloud OS 5 devices before 5.07.118. A NAS Admin authentication bypass vulnerability could allow an unauthenticated user to gain access to the device.","status":"published","published":"2020-12-11T23:50:01Z","modified":"2024-08-04T16:55:10.599Z","updated_at":"2026-11-02T14:35:55.460269Z"}],"euvd":[{"id":"EUVD-2020-21926","description":"An issue was discovered on Western Digital My Cloud OS 5 devices before 5.07.118. A NAS Admin authentication bypass vulnerability could allow an unauthenticated user to gain access to the device.","status":"published","published":"2020-12-11T23:50:01Z","modified":"2024-08-04T16:55:10Z","updated_at":"2026-11-03T03:07:07.463834Z"}],"ghsa":[{"id":"GHSA-r839-hvfq-837f","title":"An issue was discovered on Western Digital My Cloud OS 5 devices before 5.07.118. A NAS Admin...","description":"An issue was discovered on Western Digital My Cloud OS 5 devices before 5.07.118. A NAS Admin authentication bypass vulnerability could allow an unauthenticated user to gain access to the device.","status":"published","published":"2022-05-24T17:36:12Z","modified":"2023-01-27T05:02:57Z","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"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:42:08.04985Z"}],"nvd":[{"id":"CVE-2020-29563","description":"An issue was discovered on Western Digital My Cloud OS 5 devices before 5.07.118. A NAS Admin authentication bypass vulnerability could allow an unauthenticated user to gain access to the device.","status":"published","published":"2020-12-12T00:15:12.017Z","modified":"2026-06-17T03:11:26.207Z","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-287"],"updated_at":"2026-11-02T14:06:27.10541Z"}]}}