What’s Vulnerable › Vulnerabilities

CVE-2022-22990: Limited authentication bypass vulnerability on Western Digital My Cloud devices

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-01-13 · updated 2026-06-17
• Weakness: CWE-287

Description

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.

Affected products

• Western Digital My Cloud: before 5.19.117 — fixed in 5.19.117

How to fix

Upgrade to a fixed version: Western Digital My Cloud 5.19.117. Check the vendor advisory for mitigations.

References

• https://www.westerndigital.com/support/product-security/wdc-22002-my-cloud-os5-firmware-5-19-117
• https://www.zerodayinitiative.com/advisories/ZDI-22-076/
• https://www.zerodayinitiative.com/advisories/ZDI-22-347/
• https://www.westerndigital.com/support/product-security/wdc-22002-my-cloud-os5-firmware-5-19-117
• https://www.zerodayinitiative.com/advisories/ZDI-22-076/
• https://www.zerodayinitiative.com/advisories/ZDI-22-347/

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