CVE-2020-27158: Westerndigital My Cloud Firmware

Critical severity, CVSS 9.8. EPSS: 7.5% chance of exploitation in the next 30 days.

Addressed remote code execution vulnerability in cgi_api.php that allowed escalation of privileges in Western Digital My Cloud NAS devices prior to 5.04.114.

Affected products

• Westerndigital My Cloud Firmware: before 5.04.114 (fixed in 5.04.114)

Published 2020-10-27. Last modified 2026-06-17.