dbcve.org
My Cloud OsOperating system · Westerndigital

CVE-2023-22815

MEDIUM · 6.7 CVSS v3.1 Published 2023-06-30
Fix available
A fix is available. Upgrade to 5.26.300 or later.
See remediation →
73/100
Remediation priority · Elevated
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Post-authentication remote command injection vulnerability in Western Digital My Cloud OS 5 devices that could allow an attacker to execute code in the context of the root user on vulnerable CGI files. This vulnerability can only be exploited over the network and the attacker must already have admin/root privileges to carry out the exploit. An authentication bypass is required for this exploit, thereby making it more complex. The attack may not require user interaction. Since an attacker must already be authenticated, the confidentiality impact is low while the integrity and availability impact is high.  This issue affects My Cloud OS 5 devices: before 5.26.300.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

Post-authentication command injection vulnerability in Western Digital My Cloud OS 5 CGI files allows authenticated attackers with admin/root privileges to execute arbitrary code in root context. An authentication bypass is required in addition to valid credentials, making exploitation complex. The vulnerability affects firmware versions before 5.26.300.

MitigationUpgrade My Cloud OS 5 firmware to version 5.26.300 or later to patch the command injection vulnerability. If immediate patching is not feasible, restrict network access to the device and enforce strong admin credentials.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
My Cloud OsOperating system
Affected:< 5.26.300

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Confirm device model and OS version
    Access the device web interface or check the system information page to identify if the device is running Western Digital My Cloud OS 5 and note the exact firmware version installed.
    Affected if The device is a Western Digital My Cloud running OS 5 with firmware version less than 5.26.300.
  2. Compare installed firmware version
    Locate the firmware version in the device settings or via the API endpoint typically found at /api/1.0/rest/..._status and compare it against the affected range of < 5.26.300.
    Affected if The installed firmware version is below 5.26.300.
  3. Verify CGI script accessibility
    Check if the CGI binaries are accessible on the device by attempting to access common CGI endpoints or reviewing the web server configuration for exposed CGI handlers.
    Affected if CGI scripts are enabled and accessible on the web interface.
  4. Confirm admin account presence
    Review the user accounts configured on the device through the admin panel or API to determine if admin or root-level accounts exist.
    Affected if Admin or root-level user accounts are configured on the device.
  5. Check for authentication bypass exposure
    Assess whether the device is exposed to network access where an authentication bypass vulnerability could be leveraged in conjunction with valid credentials.
    Affected if The device management interface is accessible from untrusted networks.

The environment is affected if the device runs Western Digital My Cloud OS 5 with firmware version below 5.26.300 and has admin accounts with network-accessible CGI interfaces.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 5.26.300 or later
Fixed in 5.26.300
Interim mitigation

Upgrade My Cloud OS 5 firmware to version 5.26.300 or later to patch the command injection vulnerability. If immediate patching is not feasible, restrict network access to the device and enforce strong admin credentials.

Recommended fix High confidence

My Cloud OS 5 firmware version 5.26.300 or later

  1. Check the current firmware version of the My Cloud OS 5 device through the admin web interface or API
  2. Navigate to Western Digital's official support website for My Cloud products
  3. Download the firmware version 5.26.300 or later for your specific My Cloud device model
  4. Access the device's admin panel and navigate to the firmware update section
  5. Upload and apply the firmware update following the on-screen instructions
  6. After the update completes, verify the firmware version has been updated to 5.26.300 or later
  7. Confirm the device is functioning normally post-update
Caveat Review Western Digital's release notes for version 5.26.300 to check for any known compatibility issues or configuration changes required after the update

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in My Cloud Os Scoped from the published advisory
  • Consultation4.0 h
  • Implementation2.0 h
  • Testing3.0 h
  • Review / QA2.0 h
11.0 hours of engineering $1,970
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Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-22815 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data