CVE-2025-51060Public exploit

Kernel code execution via unrestricted MSR access

Published Aug 5, 2025 · Updated Jul 5, 2026

Improper access control in CPUID cpuz.sys 1.0.5.4 allows attackers to execute arbitrary Windows kernel code via crafted device-control requests. The driver exposes RDMSR and WRMSR through unvalidated IOCTLs, letting callers overwrite MSR_LSTAR and redirect KiSystemCall64 through a ROP chain. The caller must access the driver on 64-bit Windows with core isolation absent or disabled; 32-bit applicability remains unconfirmed.

CVSS severity6.5
Medium
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 access control in CPUID cpuz.sys 1.0.5.4 allows attackers to execute arbitrary Windows kernel code via crafted device-control requests. The driver exposes RDMSR and WRMSR through unvalidated IOCTLs, letting callers overwrite MSR_LSTAR and redirect KiSystemCall64 through a ROP chain. The caller must access the driver on 64-bit Windows with core isolation absent or disabled; 32-bit applicability remains unconfirmed.

The record

CVE
CVE-2025-51060
Published
Aug 5, 2025
Updated
Jul 5, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-284, T1068
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 5, 2026Record 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 privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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.

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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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
T1068Exploitation for Privilege Escalation

Public exploit references

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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