A remote code execution vulnerability was discovered on Western Digital My Cloud devices where an attacker could trick a NAS device into loading through an unsecured HTTP call. This was a result insufficient verification of calls to the device. The vulnerability was addressed by disabling checks for internet connectivity using HTTP.

A limited SSRF vulnerability was discovered on Western Digital My Cloud devices that could allow an attacker to impersonate a server and reach any page on the server by bypassing access controls. The vulnerability was addressed by creating a whitelist for valid parameters.

A command injection remote code execution vulnerability was discovered on Western Digital My Cloud Devices that could allow an attacker to execute arbitrary system commands on the device. The vulnerability was addressed by escaping individual arguments to shell functions coming from user input.

A malicious user on the same LAN could use DNS spoofing followed by a command injection attack to trick a NAS device into loading through an unsecured HTTP call. Addressed this vulnerability by disabling checks for internet connectivity using HTTP.

A limited authentication bypass vulnerability was discovered that could allow an attacker to achieve remote code execution and escalate privileges on the My Cloud devices. Addressed this vulnerability by changing access token validation logic and rewriting rule logic on PHP scripts.

My Cloud OS 5 was vulnerable to a pre-authenticated stack overflow vulnerability on the FTP service that could be exploited by unauthenticated attackers on the network. Addressed the vulnerability by adding defenses against stack overflow issues.

File and directory permissions have been corrected to prevent unintended users from modifying or accessing resources. It would be more difficult for an authenticated attacker to now traverse through the files and directories. This can only be exploited once an attacker has already found a way to get authenticated access to the device. 

Western Digital EdgeRover before 0.25 has an escalation of privileges vulnerability where a low privileged user could load malicious content into directories with higher privileges, because of how Node.js is used. An attacker can gain admin privileges and carry out malicious activities such as creating a fake library and stealing user credentials.

The iOS and macOS apps before 1.4.1 for the Western Digital G-Technology ArmorLock NVMe SSD store keys insecurely. They choose a non-preferred storage mechanism if the device has Secure Enclave support but lacks biometric authentication hardware.

Western Digital My Cloud OS 5 devices before 5.10.122 mishandle Symbolic Link Following on SMB and AFP shares. This can lead to code execution and information disclosure (by reading local files).