CVE-2022-22989: Pre-authenticated stack overflow vulnerability on FTP Service

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% 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-121

Description

My Cloud OS 5 was vulnerable to a pre-authenticated stack overflow vulnerability on the FTP service that could be exploited by unauthenticated attackers on the network. Addressed the vulnerability by adding defenses against stack overflow issues.

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.westerndigital.com/support/product-security/wdc-22002-my-cloud-os5-firmware-5-19-117

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