CVE-2026-94142Public exploit

Arbitrary kernel memory write via PhysicalAddress IOCTL

Published Sep 21, 2026 · Updated Sep 21, 2026

Write-what-where in BioStar Temperature Monitor Utility 1.2.1806.2200 allows local users to alter arbitrary physical memory. The BS_HWMIO64_W10.sys sub_1105C IOCTL handler uses the caller-controlled PhysicalAddress without sufficient validation, creating an arbitrary-write primitive. Low-privileged local access is required, and successful exploitation grants arbitrary kernel memory read and write.

CVSS severity8.8
High
EPSS probability0.18%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Write-what-where in BioStar Temperature Monitor Utility 1.2.1806.2200 allows local users to alter arbitrary physical memory. The BS_HWMIO64_W10.sys sub_1105C IOCTL handler uses the caller-controlled PhysicalAddress without sufficient validation, creating an arbitrary-write primitive. Low-privileged local access is required, and successful exploitation grants arbitrary kernel memory read and write.

The record

CVE
CVE-2026-94142
Published
Sep 21, 2026
Updated
Sep 21, 2026
Vendor
BIOSTAR Microtech International Corp.
Product
Temperature Monitor Utility
Classifications
CWE-119, CWE-123, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 21, 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?

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

  1. Affected versionversion=1.2.1806.2200

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

BIOSTAR Microtech International Corp. · Temperature Monitor Utilityversion=1.2.1806.2200

Published CVSS scores

8.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
8.5NVDCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
6.8NVDAV:L/AC:L/Au:S/C:C/I:C/A:C

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-123Write-what-where Condition
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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