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Vulnerability record · CVE-2020-27159 · published 27 October 2020

CVE-2020-27159: Westerndigital my cloud firmware os command injection vulnerability

Westerndigital · My Cloud Firmware

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

9.8 CVSS 3.1 Critical EPSS 6.2% · top 6.7% CWE-78 · OS command injection
9.8CVSS 3.1 base score, v2 10.0
6.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.comparitech.com/blog/information-security/security-vulnerabilities-80000-devices-update-now/ ExploitThird Party Advisory
https://www.westerndigital.com/support/productsecurity Vendor Advisory
https://www.westerndigital.com/support/productsecurity/wdc-20007-my-cloud-firmware-version-5-04-114 Vendor Advisory
https://www.comparitech.com/blog/information-security/security-vulnerabilities-80000-devices-update-now/ ExploitThird Party Advisory
https://www.westerndigital.com/support/productsecurity Vendor Advisory
https://www.westerndigital.com/support/productsecurity/wdc-20007-my-cloud-firmware-version-5-04-114 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2022-22995Westerndigital my cloud pr2100 firmware link following vulnerabilityThe combination of primitives offered by SMB and AFP in their default configuration allows the arbitrary writing of files. By exploiting these combin…EPSS 2.7%9.8CVE-2020-27744Westerndigital my cloud firmware os command injection vulnerabilityAn issue was discovered on Western Digital My Cloud NAS devices before 5.04.114. They allow remote code execution with resultant escalation of privil…EPSS 6.2%9.8CVE-2020-27158Westerndigital my cloud firmware os command injection vulnerabilityAddressed remote code execution vulnerability in cgi_api.php that allowed escalation of privileges in Western Digital My Cloud NAS devices prior to 5…EPSS 7.5%9.8CVE-2020-27160Westerndigital my cloud firmware path traversal vulnerabilityAddressed remote code execution vulnerability in AvailableApps.php that allowed escalation of privileges in Western Digital My Cloud NAS devices prio…EPSS 4.9%9.8CVE-2020-12830Westerndigital my cloud firmware out-of-bounds write vulnerabilityAddressed multiple stack buffer overflow vulnerabilities that could allow an attacker to carry out escalation of privileges through unauthorized remo…EPSS 3.3%9.8CVE-2020-25765Westerndigital my cloud firmware improper input validation vulnerabilityAddressed remote code execution vulnerability in reg_device.php due to insufficient validation of user input.in Western Digital My Cloud Devices prio…EPSS 6.1%9.8CVE-2019-9950Westerndigital my cloud firmware weak password requirements vulnerabilityWestern Digital My Cloud, My Cloud Mirror Gen2, My Cloud EX2 Ultra, My Cloud EX2100, My Cloud EX4100, My Cloud DL2100, My Cloud DL4100, My Cloud PR21…EPSS 2.3%9.8CVE-2018-9148Westerndigital my cloud firmware improper authentication vulnerabilityWestern Digital WD My Cloud v04.05.00-320 devices embed the session token (aka PHPSESSID) in filenames, which makes it easier for attackers to bypass…EPSS 3.6%

Source: NIST National Vulnerability Database (record CVE-2020-27159), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.