# CVE-2026-50342: Microsoft Windows MIDI Service Module privilege escalation

Source: https://junglewise.ai/threats/cve-2026-50342-microsoft-windows-midi-service-module-privilege-escalation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-14. Updated: 2026-07-14  
License: CC BY 4.0 with a link back

CVE-2026-50342 · Severity: high · CVSS 8.8 · Published 2026-07-14

A security vulnerability exists in the Windows MIDI Service, a component responsible for handling musical instrument digital interface data. An attacker who already has basic access to a computer could exploit this flaw to gain full administrative control over the system. This could allow them to view sensitive data, install malicious software, or disrupt business operations.

Technologies: [Microsoft Windows 11](https://junglewise.ai/threats/technologies/windows-11). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-50342 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-50342 being exploited in the wild.

**How severe is CVE-2026-50342?** High severity, with a CVSS score of 8.8, published 14 July 2026.

**Which products and versions are affected?** Microsoft Windows 11 10.0.26100.0 to 10.0.26100.8875.

**Is there a fix for CVE-2026-50342?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-50342 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-50342?** Check whether you run Microsoft Windows 11 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An improper access control vulnerability (CWE-284) exists in the Windows MIDI Service Module. The flaw allows a locally authenticated attacker with low privileges to bypass security restrictions and execute code with elevated permissions. The vulnerability is characterized by a CVSS 3.1 score of 8.8, notably including a 'Changed' Scope (S:C), indicating the impact can extend beyond the MIDI service itself to the underlying operating system. Microsoft has released security updates to address this issue across affected Windows 11 versions.

## Affected products

- Microsoft Windows 11 Version 24H2 10.0.26100.0 to 10.0.26100.8875
- Microsoft Windows 11 Version 25H2 10.0.26200.0 to 10.0.26100.8875
- Microsoft Windows 11 version 26H1 10.0.28000.0 to 10.0.28000.2269

## Timeline

- 2026-07-14: disclosed
- 2026-07-14: advisory

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50342](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50342)

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