CVE-2020-28971
A NAS Admin authentication bypass vulnerability could allow an unauthenticated user to execute privileged commands on the device via a cookie, because of insufficient validation of URI paths.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.83%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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, because of insufficient validation of URI paths.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.83% probability · 90th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-287
- Affected
- westerndigital/my cloud os 5
- Source
- cve@mitre.org
EPSS 3.8% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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-20-1447/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-20-1447/Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.