CVE-2019-9949
8.8 · HIGHOverview
CVE-2019-9949 is a high-severity vulnerability affecting westerndigital my_cloud_firmware. It was published on May 23, 2019 and has a CVSS 3.0 base score of 8.8 (HIGH).
This vulnerability has a CVSS 3.0 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from westerndigital. Update my_cloud_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| westerndigital | my_cloud_firmware | >= 0, < 2.31.183 | Affected |
| westerndigital | my_cloud_mirror_gen2_firmware | >= 0, < 2.31.183 | Affected |
| westerndigital | my_cloud_ex2_ultra_firmware | >= 0, < 2.31.183 | Affected |
| westerndigital | my_cloud_ex2100_firmware | >= 0, < 2.31.183 | Affected |
| westerndigital | my_cloud_ex4100_firmware | >= 0, < 2.31.183 | Affected |
| westerndigital | my_cloud_dl2100_firmware | >= 0, < 2.31.183 | Affected |
| westerndigital | my_cloud_dl4100_firmware | >= 0, < 2.31.183 | Affected |
| westerndigital | my_cloud_pr2100_firmware | >= 0, < 2.31.183 | Affected |
| westerndigital | my_cloud_pr4100_firmware | >= 0, < 2.31.183 | Affected |
References
Frequently Asked Questions
What is CVE-2019-9949?
CVE-2019-9949 is a high-severity vulnerability affecting westerndigital my_cloud_firmware. It was published on May 23, 2019 and has a CVSS 3.0 base score of 8.8 (HIGH).
How severe is CVE-2019-9949?
This vulnerability has a CVSS 3.0 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2019-9949?
Check the references section for vendor advisories and patches from westerndigital. Update my_cloud_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2019-9949?
CyberStrike's AI-powered security agents can automatically detect CVE-2019-9949 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
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