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Vulnerability record · CVE-2019-9950 · published 24 April 2019

CVE-2019-9950: Westerndigital my cloud firmware weak password requirements vulnerability

Westerndigital · My Cloud Firmware

Western 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 PR2100 and My Cloud PR4100 firmware before 2.31.174 is affected by an authentication bypass vulnerability. The login_mgr.cgi file checks credentials against /etc/shadow. However, the "nobody" account (which can be used to access the control panel API as a low-privilege logged-in user) has a default empty password, allowing an attacker to modify the My Cloud EX2 Ultra web page source code and obtain access to the My Cloud as a non-Admin My Cloud device user.

9.8 CVSS 3.0 Critical EPSS 2.3% · top 17.3% CWE-521 · Weak password requirements
9.8CVSS 3.0 base score, v2 7.5
2.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
9Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

Western 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 PR2100 and My Cloud PR4100 firmware before 2.31.174 is affected by an authentication bypass vulnerability. The login_mgr.cgi file checks credentials against /etc/shadow. However, the "nobody" account (which can be used to access the control panel API as a low-privilege logged-in user) has a default empty password, allowing an attacker to modify the My Cloud EX2 Ultra web page source code and obtain access to the My Cloud as a non-Admin My Cloud device user.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

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

References

LinkTags
https://bnbdr.github.io/posts/wd/
https://community.wd.com/t/new-release-my-cloud-firmware-versions-2-31-174-3-26-19/235932 Vendor Advisory
https://github.com/bnbdr/wd-rce/
https://support.wdc.com/downloads.aspx?g=2702&lang=en Vendor Advisory
https://bnbdr.github.io/posts/wd/
https://community.wd.com/t/new-release-my-cloud-firmware-versions-2-31-174-3-26-19/235932 Vendor Advisory
https://github.com/bnbdr/wd-rce/
https://support.wdc.com/downloads.aspx?g=2702&lang=en Vendor Advisory

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2019-9950), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.