CVE-2024-33659

High-privilege local SMM code execution

Published Feb 11, 2025 · Updated Feb 11, 2025

Improper input validation in the BiosGuard module of AMI Aptio V BKS_5.0 through BKS_5.38 allows local users to execute SMM code. AMI has not published the input, code path, or validation operation that permits arbitrary memory overwrite. Exploitation requires high local privileges and can overwrite arbitrary memory, execute at SMM level, and compromise host data or interrupt operation.

CVSS severity5.7
Medium
EPSS probability0.16%
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 the BiosGuard module of AMI Aptio V BKS_5.0 through BKS_5.38 allows local users to execute SMM code. AMI has not published the input, code path, or validation operation that permits arbitrary memory overwrite. Exploitation requires high local privileges and can overwrite arbitrary memory, execute at SMM level, and compromise host data or interrupt operation.

The record

CVE
CVE-2024-33659
Published
Feb 11, 2025
Updated
Feb 11, 2025
Vendor
American Megatrends International
Product
Aptio V
Classifications
CWE-20, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Feb 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 11, 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=BKS_5.0 <=BKS_5.38

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

American Megatrends International · Aptio Vversion=BKS_5.0 <=BKS_5.38

Published CVSS scores

5.7AMICVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:L/VI:H/VA:H/SC:L/SI:L/SA:L
8.8NVDCVSS:3.1/AV:L/AC:L/PR:L/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
T1068Exploitation for Privilege Escalation

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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