CVE-2020-28970

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

An issue was discovered on Western Digital My Cloud OS 5 devices before 5.06.115. A NAS Admin authentication bypass vulnerability could allow an unauthenticated user to execute privileged commands on the device via a cookie. (In addition, an upload endpoint could then be used by an authenticated administrator to upload executable PHP scripts.)

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-287

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://support.wdc.com/downloads.aspx?g=907&lang=en#downloadsPatch, Vendor Advisory
https://www.westerndigital.com/support/productsecurity/wdc-20009-os5-firmware-5-06-115Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-1448/Third Party Advisory, VDB Entry
https://support.wdc.com/downloads.aspx?g=907&lang=en#downloadsPatch, Vendor Advisory
https://www.westerndigital.com/support/productsecurity/wdc-20009-os5-firmware-5-06-115Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-1448/Third Party Advisory, VDB Entry

Timeline

Published: Dec 1, 2020
Last modified: Jun 17, 2026
NVD status: Modified

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