CVE-2025-22834

Unexpected firmware state via ThirdPartyVideo SetVariable

Published Aug 12, 2025 · Updated Aug 12, 2025

Improper initialization in AMI Aptio V 5.0 through 5.040 allows local users to leave a BIOS resource in an unexpected state. The CNA title identifies ThirdPartyVideo SetVariable as the locus, but AMI has not disclosed which resource is improperly initialized or which input operation triggers the condition. Local high-privilege access is required, and successful exploitation can affect firmware confidentiality, integrity, and availability.

CVSS severity5.3
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper initialization in AMI Aptio V 5.0 through 5.040 allows local users to leave a BIOS resource in an unexpected state. The CNA title identifies ThirdPartyVideo SetVariable as the locus, but AMI has not disclosed which resource is improperly initialized or which input operation triggers the condition. Local high-privilege access is required, and successful exploitation can affect firmware confidentiality, integrity, and availability.

The record

CVE
CVE-2025-22834
Published
Aug 12, 2025
Updated
Aug 12, 2025
Vendor
American Megatrends International
Product
Aptio V
Classifications
CWE-665
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 12, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 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=AptioV_5.0 <=AptioV_5.040

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

American Megatrends International · Aptio Vversion=AptioV_5.0 <=AptioV_5.040

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
4.2AMICVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-665Improper Initialization

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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