CVE-2023-22816: Limited Post-Authentication Remote Command Injection in My Cloud Products

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-06-30 · updated 2026-06-17
Weakness: CWE-78

Description

A post-authentication remote command injection vulnerability in a CGI file in Western Digital My Cloud OS 5 devices that could allow an attacker to build files with redirects and execute larger payloads. This issue affects My Cloud OS 5 devices: before 5.26.300.

Affected products

Western Digital My Cloud: before 5.26.300 — fixed in 5.26.300

How to fix

Upgrade to a fixed version: Western Digital My Cloud 5.26.300. Check the vendor advisory for mitigations.

References

https://www.westerndigital.com/support/product-security/wdc-23010-my-cloud-firmware-version-5-26-300
https://www.westerndigital.com/support/product-security/wdc-23010-my-cloud-firmware-version-5-26-300

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