CVE-2023-27504

Local privilege escalation via undisclosed condition check

Published May 16, 2024 · Updated Aug 2, 2024

Improper conditions check in Intel BIOS Guard firmware allows local privileged users to escalate privileges on affected Intel platforms. Intel has not disclosed the condition, code locus, or operation that the firmware evaluates incorrectly. Exploitation requires high privileges and high attack complexity; success crosses a security boundary and compromises confidentiality and integrity without reported service interruption.

CVSS severity7.2
High
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

Improper conditions check in Intel BIOS Guard firmware allows local privileged users to escalate privileges on affected Intel platforms. Intel has not disclosed the condition, code locus, or operation that the firmware evaluates incorrectly. Exploitation requires high privileges and high attack complexity; success crosses a security boundary and compromises confidentiality and integrity without reported service interruption.

The record

CVE
CVE-2023-27504
Published
May 16, 2024
Updated
Aug 2, 2024
Vendor
Topcon Positioning Systems, Inc.
Product
Intel BIOS Guard
Classifications
CWE-92, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. May 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=See references

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Topcon Positioning Systems, Inc. · Intel BIOS Guardversion=See references
Topcon Positioning Systems, Inc. · Comet Lakeversion=-
Topcon Positioning Systems, Inc. · Rocket Lakeversion=-
Topcon Positioning Systems, Inc. · Amber Lakeversion=-
Topcon Positioning Systems, Inc. · Ice Lakeversion=-
Topcon Positioning Systems, Inc. · Coffee Lakeversion=-
Topcon Positioning Systems, Inc. · Kaby Lakeversion=-
Topcon Positioning Systems, Inc. · Alder Lakeversion=-
Topcon Positioning Systems, Inc. · Tiger Lakeversion=-

Published CVSS scores

7.2Intel CorporationCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N

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-92DEPRECATED: Improper Sanitization of Custom Special Characters
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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