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Nuc 7 Essential Nuc7cjysamn FirmwareOperating system · Intel

CVE-2023-28738

HIGH · 7.8 CVSS v3.1 Published 2024-01-19
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
80/100
Remediation priority · High
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
Improper input validation for some Intel NUC BIOS firmware before version JY0070 may allow a privileged user to potentially enable escalation of privilege via local access.

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

Improper input validation vulnerability in Intel NUC BIOS firmware versions prior to JY0070 allows a locally authenticated privileged user to escalate privileges. The vulnerability stems from insufficient validation of certain BIOS input parameters, which could be manipulated to execute code at a higher privilege level than intended. This is a local-only attack requiring existing privileged access.

MitigationUpdate Intel NUC BIOS firmware to version JY0070 or later by downloading the appropriate BIOS update from Intel's support website and following the standard BIOS flashing procedure.

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
Nuc 7 Essential Nuc7cjysamn FirmwareOperating system
Affected:= jyglkcpx.0071
Nuc Kit Nuc7cjyhn FirmwareOperating system
Affected:= jyglkcpx.0071
Nuc Kit Nuc7pjyhn FirmwareOperating system
Affected:= jyglkcpx.0071
Nuc Kit Nuc7pjyh FirmwareOperating system
Affected:= jyglkcpx.0071
Nuc Kit Nuc7cjysal FirmwareOperating system
Affected:= jyglkcpx.0071
Nuc Kit Nuc7cjyh FirmwareOperating system
Affected:= jyglkcpx.0071

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
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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. Identify your Intel NUC model
    Locate the model number sticker on the NUC chassis or check the original packaging. Look for one of these: Nuc7cjysamn, Nuc7cjyhn, Nuc7pjyhn, Nuc7pjyh, Nuc7cjysal, or Nuc7cjyh.
    Affected if Your model matches one of the listed 7th generation NUC models.
  2. Determine the current BIOS version
    Power on the NUC and press F2 during boot to enter the BIOS setup, or use Intel's BIOS Update utility from within Windows. Navigate to the Main or Information tab to view the BIOS version string.
    Affected if The BIOS version displayed matches jyglkcpx.0071 or is an earlier version.
  3. Compare against the fixed version
    Verify whether your installed BIOS version is earlier than JY0070. The affected versions are those prior to JY0070.
    Affected if Your BIOS version is jyglkcpx.0071 or any version number lower than JY0070.
  4. Confirm local privileged access requirement
    Recognize that this vulnerability requires an attacker to already have locally authenticated privileged (administrator/root) access to the affected system.
    Affected if The system has a local privileged user account that could potentially exploit this BIOS input validation flaw.

You are affected if you own a 7th gen Intel NUC (one of the listed models) running BIOS version jyglkcpx.0071 or earlier, which is any version prior to JY0070.

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 Intel NUC BIOS firmware to version JY0070 or later by downloading the appropriate BIOS update from Intel's support website and following the standard BIOS flashing procedure.

Recommended fix High confidence

Intel NUC BIOS firmware version JY0070

  1. Identify your specific NUC model number (e.g., Nuc7cjysamn, Nuc7cjyhn, etc.)
  2. Visit the Intel Support website (intel.com/support) and navigate to the drivers and support section for Intel NUC products
  3. Search for your specific NUC model and locate the BIOS/firmware downloads section
  4. Download the BIOS update file version JY0070 (or latest available) for your specific model
  5. Review the download page for any specific update instructions or requirements
  6. Run the BIOS update utility (typically a .exe file) or copy the update to a USB drive as instructed
  7. Follow the on-screen prompts to initiate the BIOS update - do not interrupt the process
  8. Allow the system to complete the update and restart automatically if required
Caveat BIOS firmware updates carry inherent risk; power interruption during update can brick the device; ensure stable power and follow Intel's update instructions precisely

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

Fix this in Nuc 7 Essential Nuc7cjysamn Firmware Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
7.0 hours of engineering $1,240
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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-2023-28738 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