What’s Vulnerable › Vulnerabilities

CVE-2022-36331: Impersonation attack causing an Authentication Bypass on Western Digital devices

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-06-12 · updated 2026-06-17
• Weakness: CWE-290

Description

Western Digital My Cloud, My Cloud Home, My Cloud Home Duo, and SanDisk ibi devices were vulnerable to an impersonation attack that could allow an unauthenticated attacker to gain access to user data. This issue affects My Cloud OS 5 devices: before 5.25.132; My Cloud Home and My Cloud Home Duo: before 8.13.1-102; SanDisk ibi: before 8.13.1-102.

Affected products

• Westerndigital My Cloud Dl2100 Firmware: before 5.25.132 — fixed in 5.25.132
• Westerndigital My Cloud Dl4100 Firmware: before 5.25.132 — fixed in 5.25.132
• Westerndigital My Cloud Ex2100 Firmware: before 5.25.132 — fixed in 5.25.132
• Westerndigital My Cloud Ex2 Ultra Firmware: before 5.25.132 — fixed in 5.25.132
• Westerndigital My Cloud Ex4100 Firmware: before 5.25.132 — fixed in 5.25.132
• Westerndigital My Cloud Firmware: before 5.25.132 — fixed in 5.25.132
• Westerndigital My Cloud Home Duo Firmware: before 8.13.1-102 — fixed in 8.13.1-102
• Westerndigital My Cloud Home Firmware: before 8.13.1-102 — fixed in 8.13.1-102
• Westerndigital My Cloud Mirror G2 Firmware: before 5.25.132 — fixed in 5.25.132
• Westerndigital My Cloud Pr2100 Firmware: before 5.25.132 — fixed in 5.25.132
• Westerndigital My Cloud Pr4100 Firmware: before 5.25.132 — fixed in 5.25.132
• Westerndigital Sandisk Ibi Firmware: before 8.13.1-102 — fixed in 8.13.1-102

How to fix

Upgrade to a fixed version: Westerndigital My Cloud Dl2100 Firmware 5.25.132; Westerndigital My Cloud Dl4100 Firmware 5.25.132; Westerndigital My Cloud Ex2100 Firmware 5.25.132; Westerndigital My Cloud Ex2 Ultra Firmware 5.25.132; Westerndigital My Cloud Ex4100 Firmware 5.25.132; Westerndigital My Cloud Firmware 5.25.132; Westerndigital My Cloud Home Duo Firmware 8.13.1-102; Westerndigital My Cloud Home Firmware 8.13.1-102; Westerndigital My Cloud Mirror G2 Firmware 5.25.132; Westerndigital My Cloud Pr2100 Firmware 5.25.132; Westerndigital My Cloud Pr4100 Firmware 5.25.132; Westerndigital Sandisk Ibi Firmware 8.13.1-102. Check the vendor advisory for mitigations.

References

• https://https://www.westerndigital.com/support/product-security/wdc-22020-my-cloud-os-5-my-cloud-home-ibi-firmware-update
• https://www.westerndigital.com/support/product-security/wdc-22020-my-cloud-os-5-my-cloud-home-ibi-firmware-update
• https://https://www.westerndigital.com/support/product-security/wdc-22020-my-cloud-os-5-my-cloud-home-ibi-firmware-update

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