CVE-2023-39537

System compromise via undisclosed TCG2 input validation

Published Nov 14, 2023 · Updated Aug 14, 2024

Improper input validation in AMI Aptio V BIOS TCG2 allows local users to compromise confidentiality, integrity, and availability. AMI has not published the TCG2 input, validation operation, or malformed value that reaches the vulnerable firmware logic. Exploitation requires high privileges and high complexity; the public record does not distinguish the resulting data exposure, modification, or service interruption.

CVSS severity7.8
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in AMI Aptio V BIOS TCG2 allows local users to compromise confidentiality, integrity, and availability. AMI has not published the TCG2 input, validation operation, or malformed value that reaches the vulnerable firmware logic. Exploitation requires high privileges and high complexity; the public record does not distinguish the resulting data exposure, modification, or service interruption.

The record

CVE
CVE-2023-39537
Published
Nov 14, 2023
Updated
Aug 14, 2024
Vendor
American Megatrends International
Product
Aptio V
Classifications
CWE-20, CAPEC-153
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Nov 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 14, 2024Record 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=*
  2. Affected versionversion=0 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

American Megatrends International · Aptio Vversion=*; version=0 <*

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.5AMICVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-20Improper Input Validation
CAPEC-153Input Data Manipulation

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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