CVE-2020-28970
9.8
CRITICAL · CVSS 3.1 · EPSS 3.9% (pctl 90)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
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.)
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 3.94% — more likely to be exploited than 90% of all CVEs |
| Weakness | CWE-287 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2020-12-01 |
| Last modified | 2026-06-17 |
Affected (6)
| Vendor | Product |
|---|---|
| westerndigital | my cloud ex2 ultra |
| westerndigital | my cloud ex4100 |
| westerndigital | my cloud mirror gen 2 |
| westerndigital | my cloud os 5 |
| westerndigital | my cloud pr2100 |
| westerndigital | my cloud pr4100 |
References
- https://support.wdc.com/downloads.aspx?g=907&lang=en#downloads
- https://www.westerndigital.com/support/productsecurity/wdc-20009-os5-firmware-5-06-115
- https://www.zerodayinitiative.com/advisories/ZDI-20-1448/
- https://support.wdc.com/downloads.aspx?g=907&lang=en#downloads
- https://www.westerndigital.com/support/productsecurity/wdc-20009-os5-firmware-5-06-115
- https://www.zerodayinitiative.com/advisories/ZDI-20-1448/
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