CVE-2023-43758

Local privilege escalation via undisclosed UEFI input validation

Published Feb 12, 2025 · Updated Nov 3, 2025

Improper input validation in Intel UEFI firmware for affected Pentium Silver and Celeron processors allows local users to escalate privileges. Intel has not disclosed the specific firmware routine, accepted input, or validation error that enables the privilege boundary to be crossed. Exploitation requires high privileges and local access to a system using CPU ID 706A1 and platform ID 01; success compromises confidentiality, integrity, and availability across the security boundary.

CVSS severity8.2
High
EPSS probability0.28%
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 Intel UEFI firmware for affected Pentium Silver and Celeron processors allows local users to escalate privileges. Intel has not disclosed the specific firmware routine, accepted input, or validation error that enables the privilege boundary to be crossed. Exploitation requires high privileges and local access to a system using CPU ID 706A1 and platform ID 01; success compromises confidentiality, integrity, and availability across the security boundary.

The record

CVE
CVE-2023-43758
Published
Feb 12, 2025
Updated
Nov 3, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Feb 12, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.2Intel CorporationCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
8.7Intel CorporationCVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA: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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