Western Digital My Cloud OS 5 arbitrary file read and write vulnerability via ftp

published 2023-01-25 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-34162

cvss: 6.7; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 36.4%; EPSS 36.4% chance of exploitation in 30 days, percentile 98%
public exploits: 0; none known

A vulnerability in the FTP service of Western Digital My Cloud OS 5 devices running firmware versions prior to 5.26.119 allows an attacker to read and write arbitrary files. This could lead to a full NAS compromise and would give remote execution capabilities to the attacker.

Patch / fix

fixed in 1

Western Digital My Cloud 5.26.119

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 19 mo ago (2025-04-04)

Exploit prediction

36.41% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.7	CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Western Digital My Cloud

Classification

Weakness

CWE-23 Relative Path Traversal
CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

westerndigital.com /en-in/support/product-security/wdc-23002-my-cloud-firmware-version-5-26-119
vendor-advisory

Sources

CVE List CVE-2022-29844
NVD CVE-2022-29844

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Summary