Exposure of Sensitive System Information to an Unauthorized Control Sphere in Microsoft Windows - CVE-2026-83907
Published: October 14, 2026
Vulnerability identifier: #VU155050
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-2026-83907
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 Hello when system information is made accessible locally. A local user can view heap memory from a privileged process running on the server to disclose sensitive information.
Affected software
Microsoft Windows
How to mitigate CVE-2026-83907
Install security update from vendor's website.
Microsoft Windows - addressed in versions 10 21H2 10.0.19044.7807, 11 23H2 10.0.22631.7652, 11 24H2 10.0.26100.9711, 11 25H2 10.0.26200.9711, 11 26H1 10.0.28000.3231