Vulnerability Monitor

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CVE-2020-27159

Addressed remote code execution vulnerability in DsdkProxy.php due to insufficient sanitization and insufficient validation of user input in Western Digital My Cloud NAS devices prior to 5.04.114

Security Impact Summary

This vulnerability carries a CRITICAL severity rating with a CVSS v3.1 score of 9.8, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 6 products from westerndigital, from westerndigital, from westerndigital and 3 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2020-10-27T20:15:22.110

Last Modified

2026-06-17T03:08:53.127

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 9.8 (CRITICAL)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

10.0

Impact Score

10.0

Weaknesses

Type: Primary
CWE-78

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	westerndigital	my_cloud_firmware	< 5.04.114	Yes
Hardware	westerndigital	my_cloud_ex4100	-	No
Hardware	westerndigital	my_cloud_expert_series_ex2	-	No
Hardware	westerndigital	my_cloud_mirror_-_gen_2	-	No
Hardware	westerndigital	my_cloud_pr2100	-	No
Hardware	westerndigital	my_cloud_pr4100	-	No

References

https://www.comparitech.com/blog/information-security/security-vulnerabilities-80000-devices-update-now/ Exploit, Third Party Advisory ([email protected])
https://www.westerndigital.com/support/productsecurity Vendor Advisory ([email protected])
https://www.westerndigital.com/support/productsecurity/wdc-20007-my-cloud-firmware-version-5-04-114 Vendor Advisory ([email protected])
https://www.comparitech.com/blog/information-security/security-vulnerabilities-80000-devices-update-now/ Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.westerndigital.com/support/productsecurity Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.westerndigital.com/support/productsecurity/wdc-20007-my-cloud-firmware-version-5-04-114 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For westerndigital's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.