CVE-2024-23487

Privilege escalation via unchecked UserAuthenticationSmm buffer

Published May 16, 2024 · Updated Aug 20, 2024

Improper input validation in Intel Server D50DNP Family UEFI firmware allows local users with high privileges to escalate privileges. The UserAuthenticationSmm driver uses a memory buffer without checking it before use; Intel does not disclose the buffer source or exact validation condition. Exploitation requires local access, high existing privileges, and high-complexity conditions, and allows compromise beyond the firmware security boundary.

CVSS severity7.5
High
EPSS probability0.20%
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 Server D50DNP Family UEFI firmware allows local users with high privileges to escalate privileges. The UserAuthenticationSmm driver uses a memory buffer without checking it before use; Intel does not disclose the buffer source or exact validation condition. Exploitation requires local access, high existing privileges, and high-complexity conditions, and allows compromise beyond the firmware security boundary.

The record

CVE
CVE-2024-23487
Published
May 16, 2024
Updated
Aug 20, 2024
Vendor
Topcon Positioning Systems, Inc.
Product
Intel Server System D50TNP2MHSVAC Firmware
Classifications
CWE-20, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. May 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 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=0 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Topcon Positioning Systems, Inc. · Intel Server System D50TNP2MHSVAC Firmwareversion=0 <*
Topcon Positioning Systems, Inc. · Intel Server D50DNP Family UEFI Firmwareversion=See references

Published CVSS scores

7.5IntelCVSS: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.

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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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