CVE-2022-29844: western_digital my_cloud_firmware Relative Path Traversal

Vulnerability summary

CVE-2022-29844 is a critical (CVSS 9.8) Relative Path Traversal vulnerability in western_digital my_cloud_firmware. EPSS estimates a 36.41% chance of exploitation in the next 30 days, higher than 98.4% of scored vulnerabilities.

Timeline

1. 25-01-2023
   PublishedVulnerability first disclosed.
2. 04-04-2025
   Last modifiedVulnerability information updated.

Description

A vulnerability in the FTP service of Western Digital My Cloud OS 5 devices running firmware versions prior to 5.26.119 allows an attacker to read and write arbitrary files. This could lead to a full NAS compromise and would give remote execution capabilities to the attacker.

• CWE-23Relative Path TraversalThe product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory.
• CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.