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TI-2026-63347 Aliases CVE-2026-94142GHSA-8fx2-frcj-2gw4

BioStar Temperature Monitor Utility IOCTL BS_HWMIO64_W10.sys sub_1105C write-what-where

Priority HIGH 75CWE-119Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

A security vulnerability has been detected in BioStar Temperature Monitor Utility 1.2.1806.2200. Affected by this vulnerability is the function sub_1105C of the file BS_HWMIO64_W10.sys of the component IOCTL Handler. Such manipulation of the argument PhysicalAddress leads to write-what-where condition. The attack needs to be performed locally. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00182 7th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
BioStarTemperature Monitor Utility1.2.1806.2200—No fix listedCNA
  • Temperature Monitor Utility VendorBioStar Affected 1.2.1806.2200 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:biostar:temperature_monitor_utility:*:*:*:*:*:*:*:*——BioStar
  • cpe:2.3:a:biostar:temperature_monitor_utility:*:*:*:*:*:*:*:* Versions — — ·BioStar

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-94142
  2. 2026-10-03 Alias added: GHSA-8fx2-frcj-2gw4

References

—

  • TI-2026-63340 BioStar VALKYRIE AURORA IOCTL BS_RVSIO64.sys sub_1105C write-what-where CVSS 4.0CRITICAL 9.3
  • TI-2026-63339 BioStar VIVID LED DJ IOCTL BS_LED64.sys sub_1105C write-what-where CVSS 4.0CRITICAL 9.3
  • TI-2026-63351 BioStar BIOS Update Utility IOCTL BSMEM64_W10.sys sub_110BC write-what-where CVSS 4.0CRITICAL 9.3
  • TI-2021-20294 An issue was discovered in BS_RCIO64.sys in Biostar RACING GT Evo 2.1.1905.1700. CVSS 3.1HIGH 7.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences