CVE-2023-25938

Administrator-level UEFI variable modification

Published Jun 23, 2023 · Updated Nov 7, 2024

Improper input validation in all versions of Dell Client Platform BIOS allows local users with administrator privileges to modify a UEFI variable. Dell has not published the affected firmware routine, the rejected input property, or how validation of the UEFI variable write fails. Administrator-level local access is required; the documented consequence is limited to firmware-variable modification and low availability impact.

CVSS severity5.1
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper input validation in all versions of Dell Client Platform BIOS allows local users with administrator privileges to modify a UEFI variable. Dell has not published the affected firmware routine, the rejected input property, or how validation of the UEFI variable write fails. Administrator-level local access is required; the documented consequence is limited to firmware-variable modification and low availability impact.

The record

CVE
CVE-2023-25938
Published
Jun 23, 2023
Updated
Nov 7, 2024
Vendor
Dell
Product
Dell Client Platform BIOS
Classifications
CWE-20, T1542.001
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jun 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 7, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=All Versions

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Dell · Dell Client Platform BIOSversion=All Versions

Published CVSS scores

5.1DellCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/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.

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
T1542.001Pre-OS Boot: System Firmware

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo