CVE-2024-33658

Local privilege escalation via BIOS memory-bounds violation

Published Nov 12, 2024 · Updated Nov 21, 2024

Memory-bounds violation in AMI Aptio V BKS_5.0 through BKS_5.37 allows local users to escalate privileges through BIOS access. AMI identifies the affected locus only as the BIOS and has not disclosed the buffer, operation, or input that crosses its bounds. Exploitation requires low privileges, local access, and passive user interaction, and successful exploitation can execute arbitrary code and alter firmware integrity.

CVSS severity4.4
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory-bounds violation in AMI Aptio V BKS_5.0 through BKS_5.37 allows local users to escalate privileges through BIOS access. AMI identifies the affected locus only as the BIOS and has not disclosed the buffer, operation, or input that crosses its bounds. Exploitation requires low privileges, local access, and passive user interaction, and successful exploitation can execute arbitrary code and alter firmware integrity.

The record

CVE
CVE-2024-33658
Published
Nov 12, 2024
Updated
Nov 21, 2024
Vendor
American Megatrends International
Product
Aptio V
Classifications
CWE-119, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 21, 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=BKS_5.0 <=BKS_5.37

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

American Megatrends International · Aptio Vversion=BKS_5.0 <=BKS_5.37

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.4AMICVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:L/VI:H/VA:L/SC:L/SI:L/SA: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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
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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