CVE-2019-9949

What it is

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.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of data exposure, data tampering, service disruption.

Exploit odds

3.0% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2019-05-23 14:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 02:44 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 3.0% in the next 30 days (EPSS).
• Severity: 8.8 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2019-05-23 14:29 UTC

Last modified

2026-06-17 02:44 UTC

Exploit probability

3.0% · EPSS, next 30 days

Weakness

CWE-59

Record status

Modified

Affected

• 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

Attack profile CVSS 3.0 · 8.8

Attack vector

Network

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2019-9949.md and follow it. Check whether this project is affected by CVE-2019-9949. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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