CVE-2023-22655

Privilege escalation via misconfigured trusted-execution registers

Published Mar 14, 2024 · Updated Feb 13, 2025

Protection failure in Intel Xeon processors using SGX or TDX allows local privileged users to escalate privileges through malicious firmware. BIOS or SMM firmware can misconfigure critical system registers outside the trusted computing base, exposing or corrupting confidential-computing data. Exploitation requires high local privileges and an SGX- or TDX-enabled platform, with no reported availability impact.

CVSS severity6.1
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Protection failure in Intel Xeon processors using SGX or TDX allows local privileged users to escalate privileges through malicious firmware. BIOS or SMM firmware can misconfigure critical system registers outside the trusted computing base, exposing or corrupting confidential-computing data. Exploitation requires high local privileges and an SGX- or TDX-enabled platform, with no reported availability impact.

The record

CVE
CVE-2023-22655
Published
Mar 14, 2024
Updated
Feb 13, 2025
Vendor
Topcon Positioning Systems, Inc.
Product
4th Gen Intel Xeon Scalable Processors with Intel vRAN Boost
Classifications
CWE-693, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Mar 14, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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?

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. · 4th Gen Intel Xeon Scalable Processors with Intel vRAN Boostversion=0 <*
Topcon Positioning Systems, Inc. · 3rd Gen Intel Xeon Scalable Processorsversion=0 <*
Topcon Positioning Systems, Inc. · 4th Gen Intel Xeon Gold Processorsversion=0 <*
Topcon Positioning Systems, Inc. · 4th Gen Intel Xeon Silver Processorsversion=0 <*
Topcon Positioning Systems, Inc. · Intel Xeon D Processorversion=0 <*
Topcon Positioning Systems, Inc. · 4th Gen Intel Xeon Platinum Processorsversion=0 <*
Topcon Positioning Systems, Inc. · Intel Xeon CPU Max Seriesversion=0 <*
Topcon Positioning Systems, Inc. · 4th Gen Intel Xeon Scalable Processorsversion=0 <*
Topcon Positioning Systems, Inc. · 4th Gen Intel Xeon Bronze Processorsversion=0 <*

Published CVSS scores

6.1Intel CorporationCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/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-693Protection Mechanism Failure
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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