{"id":"CVE-2020-28940","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-28940","generatedAt":"2026-10-28T00:53:51.555Z","title":"On Western Digital My Cloud OS 5 devices before 5.06.115, the NAS Admin dashboard has an authentication bypass vulnerability that could allow an unauthenticated user to execute privileged commands on the device.","description":"On Western Digital My Cloud OS 5 devices before 5.06.115, the NAS Admin dashboard has an authentication bypass vulnerability that could allow an unauthenticated user to execute privileged commands on the device.","published":"2020-12-01T16:15:11.000Z","lastModified":"2026-06-17T03:10:51.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-287"],"affected":["westerndigital/my cloud os 5"],"epss":{"score":0.03944,"percentile":0.90333,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (3.94%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://support.wdc.com/downloads.aspx?g=907&lang=en#downloads","tags":["Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://www.westerndigital.com/support/productsecurity/wdc-20009-os5-firmware-5-06-115","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-20-1445/","tags":["Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://support.wdc.com/downloads.aspx?g=907&lang=en#downloads","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.westerndigital.com/support/productsecurity/wdc-20009-os5-firmware-5-06-115","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-20-1445/","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-28940","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}