CVE-2022-29844Network attack vector

Remote code execution via FTP buffer overflow

Published Jan 25, 2023 · Updated Apr 4, 2025

Buffer overflow in the FTP service of Western Digital My Cloud OS 5 before 5.26.119 allows remote attackers to execute code. The FTP server copies attacker-controlled data into a fixed-length buffer without validating its length, causing memory corruption. Reachability requires access to the adjacent network and an enabled FTP service; successful exploitation executes code as root and can fully compromise the NAS.

CVSS severity9.8
Critical
EPSS probability36.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in the FTP service of Western Digital My Cloud OS 5 before 5.26.119 allows remote attackers to execute code. The FTP server copies attacker-controlled data into a fixed-length buffer without validating its length, causing memory corruption. Reachability requires access to the adjacent network and an enabled FTP service; successful exploitation executes code as root and can fully compromise the NAS.

The record

CVE
CVE-2022-29844
Published
Jan 25, 2023
Updated
Apr 4, 2025
Vendor
Western Digital Corporation
Product
My Cloud
Classifications
CWE-22, CWE-23, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 4, 2025Record 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 <5.26.119

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Western Digital Corporation · My Cloudversion=My Cloud OS 5 <5.26.119

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.7Western DigitalCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-23Relative Path Traversal
T1210Exploitation of Remote Services

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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