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Aptio VOperating system · Ami

CVE-2025-33045

MEDIUM · 6.7 CVSS v3.1 Published 2025-09-09
Fix available
A fix is available. Upgrade to 5.040 or later.
See remediation →
69/100
Remediation priority · Elevated
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
APTIOV contains vulnerabilities in the BIOS where a privileged user may cause “Write-what-where Condition” and “Exposure of Sensitive Information to an Unauthorized Actor” through local access. The successful exploitation of these vulnerabilities can lead to information disclosure, arbitrary data writing, and impact Confidentiality, Integrity, and Availability.

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

APTIOV BIOS contains vulnerabilities allowing a privileged local user to perform arbitrary memory writes (write-what-where) and access sensitive information. These firmware-level flaws can impact confidentiality, integrity, and availability of the affected system.

MitigationApply vendor-provided BIOS/firmware updates for affected systems. In enterprise environments, use centralized firmware management tools and test updates on representative hardware before broad deployment.

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
Aptio VOperating system
Affected:>= 5.0, < 5.040

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

CVSS:3.1/AV:L/AC:L/PR:H/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 BIOS vendor and version
    Use system utilities to retrieve BIOS information. On Linux: 'dmidecode -s bios-version' or 'dmidecode -t bios'. On Windows: 'wmic bios get SMBIOSBIOSVersion' or check System Information (msinfo32). On UEFI systems, also check the BIOS setup utility (typically accessed via F2, F12, or Delete during boot).
    Affected if The BIOS vendor is identified as AMI Aptio V and the version falls within the range >= 5.0 and < 5.040
  2. Confirm AMI Aptio V firmware is in use
    Verify the BIOS/firmware is produced by American Megatrends (AMI) and uses the Aptio V core. This information appears in BIOS setup screens, boot logs, or system information utilities.
    Affected if The firmware is AMI Aptio V (American Megatrends Aptio 5.x)
  3. Compare installed version against affected range
    Document the exact version number displayed (e.g., 5.02, 5.03, 5.038). Compare numerically against the affected range: any version from 5.0 up to but not including 5.040 is vulnerable.
    Affected if Installed version is 5.0, 5.01, 5.02, 5.03, 5.031, 5.038, 5.039, or any 5.0xx version below 5.040

A system is affected if it runs AMI Aptio V firmware version 5.0 or higher but lower than version 5.040.

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 5.040 or later
Fixed in 5.040
Interim mitigation

Apply vendor-provided BIOS/firmware updates for affected systems. In enterprise environments, use centralized firmware management tools and test updates on representative hardware before broad deployment.

Recommended fix Moderate confidence

Aptio V firmware version 5.040 or later

  1. Obtain the Aptio V firmware version 5.040 or later from your OEM (Original Equipment Manufacturer) - do not obtain firmware from unofficial sources
  2. Verify the firmware matches your specific motherboard/system model
  3. Follow your OEM's standard BIOS/firmware update procedure, which typically involves: a) Download the firmware update utility or BIOS file from the OEM, b) Run the update utility or place the file on a USB flash drive, c) Reboot the system and enter the BIOS/UEFI setup, d) Select the firmware update option or use the OEM's flashing tool from within the operating system
  4. After flashing, verify the BIOS version has been updated to 5.040 or later
Caveat BIOS firmware updates carry a risk of system incompatibility if not matched to the correct OEM model; power interruption during flash can render the system inoperable

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

Fix this in Aptio V Scoped from the published advisory
  • Consultation8.0 h
  • Implementation16.0 h
  • Testing8.0 h
  • Review / QA4.0 h
36.0 hours of engineering $6,400
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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-2025-33045 in production — separate from our analysis above.

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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