CVE-2022-36327: Path traversal vulnerability leading to an arbitrary file write in Western Digital devices

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-05-18 · updated 2026-06-17
Weakness: CWE-22

Description

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability that could allow an attacker to write files to locations with certain critical filesystem types leading to remote code execution was discovered in Western Digital My Cloud Home, My Cloud Home Duo, SanDisk ibi and Western Digital My Cloud OS 5 devices. This issue requires an authentication bypass issue to be triggered before this can be exploited. This issue affects My Cloud Home and My Cloud Home Duo: before 9.4.0-191; ibi: before 9.4.0-191; My Cloud OS 5: before 5.26.202.

Affected products

Westerndigital My Cloud Home Duo Firmware: before 9.4.0-191 — fixed in 9.4.0-191
Westerndigital My Cloud Home Firmware: before 9.4.0-191 — fixed in 9.4.0-191
Westerndigital My Cloud Os 5: before 5.26.202 — fixed in 5.26.202
Westerndigital Sandisk Ibi Firmware: before 9.4.0-191 — fixed in 9.4.0-191

How to fix

Upgrade to a fixed version: Westerndigital My Cloud Home Duo Firmware 9.4.0-191; Westerndigital My Cloud Home Firmware 9.4.0-191; Westerndigital My Cloud Os 5 5.26.202; Westerndigital Sandisk Ibi Firmware 9.4.0-191. Check the vendor advisory for mitigations.

References

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