Limited Post-Authentication Remote Command Injection in My Cloud Products

published 2023-06-30 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-26928

cvss: 6.0; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 58%
public exploits: 0; none known

A post-authentication remote command injection vulnerability in a CGI file in Western Digital My Cloud OS 5 devices that could allow an attacker to build files with redirects and execute larger payloads. This issue affects My Cloud OS 5 devices: before 5.26.300.

Patch / fix

fixed in 2

Western Digital My Cloud OS 5 5.26.300
westerndigital my_cloud_os_5 5.26.300

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-09-09)

Exploit prediction

0.87% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.0	CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:H/A:H
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Western Digital My Cloud OS 5
westerndigital my_cloud_os_5

Classification

Weakness

CWE-78 Improper Neutralization of Special Elements used in an OS Command
CWE-77 Improper Neutralization of Special Elements used in a Command

References

westerndigital.com /support/product-security/wdc-23010-my-cloud-firmware-version-5-26-300
vendor-advisory

Sources

CVE List CVE-2023-22816
NVD CVE-2023-22816

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Summary