dbcve.org
Missing AuthenticationWeakness · CWE-306

CVE-2025-32738

MEDIUM · 5.3 CVSS v3.1 Published 2025-05-15
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
62/100
Remediation priority · Elevated
Remotely reachable No privileges 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
Missing authentication for critical function issue exists in I-O DATA network attached hard disk 'HDL-T Series' firmware Ver.1.21 and earlier. If exploited, a remote unauthenticated attacker may change the product settings.

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 · high confidence

Missing authentication for critical function in I-O DATA HDL-T series network attached storage devices allows remote unauthenticated attackers to modify device settings via HTTP requests without any credentials. The vulnerability affects firmware versions 1.21 and earlier.

MitigationUpdate HDL-T Series firmware to a version newer than 1.21 when available. Until then, restrict network access to the NAS devices using firewall rules or network segmentation to prevent unauthorized access.

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

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
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

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

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. Identify the device model
    Access the NAS web interface or check the device label/menu to confirm it is an I-O DATA HDL-T series network attached storage device
    Affected if The device is not an I-O DATA HDL-T series NAS
  2. Check the installed firmware version
    Log into the NAS admin panel and navigate to the system information or firmware update section to view the current firmware version, or access the diagnostic page at /cgi-bin/system_info via HTTP
    Affected if The firmware version is 1.21 or earlier
  3. Verify HTTP management interface accessibility
    Attempt to access the NAS HTTP management port (typically port 80 or 8080) from a network location to confirm the web interface is reachable
    Affected if The HTTP management interface is exposed to untrusted networks
  4. Test for unauthenticated parameter modification
    Send a crafted HTTP POST request to the CGI endpoint (such as /cgi-bin/set_settings or similar) with a test parameter without providing any authentication credentials and observe the response
    Affected if The device accepts and processes the request without requiring authentication

The environment is affected if the device is an I-O DATA HDL-T series NAS running firmware version 1.21 or earlier with its HTTP management interface accessible to network attackers.

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
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update HDL-T Series firmware to a version newer than 1.21 when available. Until then, restrict network access to the NAS devices using firewall rules or network segmentation to prevent unauthorized access.

Recommended fix Moderate confidence

HDL-T Series firmware Ver.1.22 or later (check I-O DATA website for exact latest version)

  1. 1. Identify the specific HDL-T Series model number (e.g., HDL-T-xxx) on the product label or device documentation.
  2. 2. Access the device's web management interface by entering its IP address in a web browser.
  3. 3. Log in with administrator credentials to access settings.
  4. 4. Navigate to the firmware update section (typically under 'System', 'Maintenance', or 'Firmware Update').
  5. 5. Check the current firmware version displayed.
  6. 6. Visit the official I-O DATA support page at www.iodata.jp and locate the download page for the HDL-T Series.
  7. 7. Download the latest firmware version available (ensure it is newer than Ver.1.21).
  8. 8. In the web interface, select the option to update firmware and point to the downloaded file.
Caveat Firmware updates may reset some settings to defaults; backup configuration before updating if possible

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

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
13.0 hours of engineering $2,330
Get help mitigating

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,728.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2025-32738 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

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-2025-32738 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

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