CVE-2020-29563

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-12-12 · updated 2026-06-17
Weakness: CWE-287

Description

An issue was discovered on Western Digital My Cloud OS 5 devices before 5.07.118. A NAS Admin authentication bypass vulnerability could allow an unauthenticated user to gain access to the device.

Affected products

Westerndigital My Cloud Os 5: before 5.07.118 — fixed in 5.07.118

How to fix

Upgrade to a fixed version: Westerndigital My Cloud Os 5 5.07.118. Check the vendor advisory for mitigations.

References

https://www.westerndigital.com/support/productsecurity/wdc-20010-my-cloud-os5-firmware-5-07-118
https://www.zerodayinitiative.com/advisories/ZDI-20-1446/
https://www.westerndigital.com/support/productsecurity/wdc-20010-my-cloud-os5-firmware-5-07-118
https://www.zerodayinitiative.com/advisories/ZDI-20-1446/

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