An issue was discovered on Western Digital My Cloud OS 5 devices before 5.06.115.
Priority MEDIUM 49CWE-287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-287.
Summary
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.)
Why it matters now
EPSS 0.03944 90th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:westerndigital:my_cloud_os_5:*:*:*:*:*:*:*:* | before 5.06.115 | Vulnerable | Westerndigital |
| cpe:2.3:h:westerndigital:my_cloud_ex2_ultra:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Westerndigital |
| cpe:2.3:h:westerndigital:my_cloud_ex4100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Westerndigital |
| cpe:2.3:h:westerndigital:my_cloud_mirror_gen_2:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Westerndigital |
| cpe:2.3:h:westerndigital:my_cloud_pr2100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Westerndigital |
| cpe:2.3:h:westerndigital:my_cloud_pr4100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Westerndigital |
- cpe:2.3:o:westerndigital:my_cloud_os_5:*:*:*:*:*:*:*:* Versions before 5.06.115 Vulnerable ·Westerndigital
- cpe:2.3:h:westerndigital:my_cloud_ex2_ultra:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Westerndigital
- cpe:2.3:h:westerndigital:my_cloud_ex4100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Westerndigital
- cpe:2.3:h:westerndigital:my_cloud_mirror_gen_2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Westerndigital
- cpe:2.3:h:westerndigital:my_cloud_pr2100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Westerndigital
- cpe:2.3:h:westerndigital:my_cloud_pr4100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Westerndigital
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-28970
- 2026-10-03 Alias added: GHSA-53g2-3hfr-5746
References
More Westerndigital My Cloud Os 5 vulnerabilities
- TI-2020-17494 An issue was discovered on Western Digital My Cloud OS 5 devices before 5.06.115. CVSS 3.1CRITICAL 9.8
- TI-2020-17468 On Western Digital My Cloud OS 5 devices before 5.06.115, the NAS Admin dashboard has an… CVSS 3.1CRITICAL 9.8
- TI-2020-17752 An issue was discovered on Western Digital My Cloud OS 5 devices before 5.07.118. CVSS 3.1CRITICAL 9.8
- TI-2022-16674 Path traversal vulnerability leading to an arbitrary file write in Western Digital devices CVSS 3.1CRITICAL 9.8
- TI-2022-16675 Path Traversal Vulnerability leading to an arbitrary file read in Western Digital devices CVSS 3.1MEDIUM 5.8
- TI-2022-16673 Resource Exhaustion Vulnerability in Western Digital devices CVSS 3.1MEDIUM 4.9
Sources
- CVE-2020-28970 · CVE Program
- CVE-2020-28970 · NVD
- FIRST EPSS
- GHSA-53g2-3hfr-5746 · GitHub Advisory Database · CC BY 4.0
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