CVE-2019-9949

Name: CVE-2019-9949
Creator: NVD / NIST
Published: 2019-05-23T14:29:08+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.05%

Last modified Jun 17, 2026

CVE-2019-9949 is a vulnerability of currently unknown severity. Western Digital My Cloud Cloud, Mirror Gen2, EX2 Ultra, EX2100, EX4100, DL2100, DL4100, PR2100 and PR4100 before firmware 2.31.183 are affected by a code execution (as root, starting from a low-privilege user session) vulnerability. The cgi-bin/webfile_mgr.cgi file allows arbitrary file write by abusing symlinks. EPSS estimates a 3.05% chance of exploitation in the next 30 days.

Description

Western Digital My Cloud Cloud, Mirror Gen2, EX2 Ultra, EX2100, EX4100, DL2100, DL4100, PR2100 and PR4100 before firmware 2.31.183 are affected by a code execution (as root, starting from a low-privilege user session) vulnerability. The cgi-bin/webfile_mgr.cgi file allows arbitrary file write by abusing symlinks. Specifically, this occurs by uploading a tar archive that contains a symbolic link, then uploading another archive that writes a file to the link using the "cgi_untar" command. Other commands might also be susceptible. Code can be executed because the "name" parameter passed to the cgi_unzip command is not sanitized.

Metrics

EPSS Probability

3.05%

85.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-59

Affected Software

Vendor	Product	Versions
Westerndigital	My Cloud Firmware	< 2.31.183
Westerndigital	My Cloud Mirror Gen2 Firmware	< 2.31.183
Westerndigital	My Cloud Ex2 Ultra Firmware	< 2.31.183
Westerndigital	My Cloud Ex2100 Firmware	< 2.31.183
Westerndigital	My Cloud Ex4100 Firmware	< 2.31.183
Westerndigital	My Cloud Dl2100 Firmware	< 2.31.183
Westerndigital	My Cloud Dl4100 Firmware	< 2.31.183
Westerndigital	My Cloud Pr2100 Firmware	< 2.31.183
Westerndigital	My Cloud Pr4100 Firmware	< 2.31.183

References

https://bnbdr.github.io/posts/wd/Exploit, Third Party Advisory
https://community.wd.com/t/new-release-my-cloud-firmware-versions-2-31-183-05-20-2019/237717Vendor Advisory
https://github.com/bnbdr/wd-rce/Exploit, Third Party Advisory
https://bnbdr.github.io/posts/wd/Exploit, Third Party Advisory
https://community.wd.com/t/new-release-my-cloud-firmware-versions-2-31-183-05-20-2019/237717Vendor Advisory
https://github.com/bnbdr/wd-rce/Exploit, Third Party Advisory

Timeline

Published: May 23, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-9949?

How severe is CVE-2019-9949?

Severity scoring for CVE-2019-9949 is pending analysis. The EPSS model estimates a 3.05% probability of exploitation in the next 30 days.

How do I fix CVE-2019-9949?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-9949?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST