Exposure of Sensitive System Information to an Unauthorized Control Sphere in Microsoft Windows - CVE-2026-83773
Published: October 14, 2026
Vulnerability identifier: #VU154935
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-83773
CWE-ID: CWE-497
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to exposure of sensitive system information to an unauthorized control sphere in Windows MIDI Service Module when accessing system information locally. A local user can read small portions of heap memory to disclose sensitive information.
Affected software
Microsoft Windows
How to mitigate CVE-2026-83773
Install security update from vendor's website.
Microsoft Windows - addressed in versions 11 24H2 10.0.26100.9711, 11 25H2 10.0.26200.9711, 11 26H1 10.0.28000.3231