CVE-2022-22991

Root code execution via unvalidated ConnectivityService string

Published Jan 13, 2022 · Updated Aug 3, 2024

OS command injection in Western Digital My Cloud OS 5 before 5.19.117 allows remote attackers on the same LAN to execute code as root. ConnectivityService passes a user-supplied string to a system call without proper validation after DNS spoofing redirects an unsecured HTTP connectivity check. Exploitation requires adjacent-network access and no authentication; successful attacks gain root-context code execution on the NAS.

CVSS severity8.8
High
EPSS probability1.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Western Digital My Cloud OS 5 before 5.19.117 allows remote attackers on the same LAN to execute code as root. ConnectivityService passes a user-supplied string to a system call without proper validation after DNS spoofing redirects an unsecured HTTP connectivity check. Exploitation requires adjacent-network access and no authentication; successful attacks gain root-context code execution on the NAS.

The record

CVE
CVE-2022-22991
Published
Jan 13, 2022
Updated
Aug 3, 2024
Vendor
Western Digital Corporation
Product
My Cloud
Classifications
CWE-78, CWE-77, T1059
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=My Cloud OS 5 <5.19.117

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Western Digital Corporation · My Cloudversion=My Cloud OS 5 <5.19.117

Published CVSS scores

8.8National Institute of Standards and TechnologyCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.3National Institute of Standards and TechnologyAV:A/AC:L/Au:N/C:C/I:C/A:C
7.8Western Digital CorporationCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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