CVE-2026-83909
MediumCVSS 4.7Exploitation Probability (EPSS)
Low risk36th percentile - higher than 36% of all known CVEs
Summary
Exposure of sensitive system information to an unauthorized control sphere in the Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
Risk Assessment
A locally authenticated attacker could access sensitive system data, potentially facilitating further attacks and privilege escalation.
Recommendation
Immediately install the security update for the Windows Win32 Kernel Subsystem and limit local user privileges.
Other vulnerabilities in Windows Win32 Kernel Subsystem
See all- CVE-2025-24983HighActively exploited
Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.
- CVE-2022-41113High
Vulnerability in the Windows Win32 Kernel Subsystem allows elevation of privilege. An attacker could exploit it to gain higher privileges on the system.
- CVE-2026-96853Medium
Time-of-check time-of-use (toctou) race condition in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
- CVE-2026-96848Medium
Buffer over-read in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
- CVE-2026-96249High
Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.
- CVE-2026-85858High
Out-of-bounds read in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.
- CVE-2026-85804High
A use after free in the Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.
- CVE-2026-85802High
A use after free in the Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.
- CVE-2026-83901High
Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.
- CVE-2026-83897Medium
A vulnerability in the Windows Win32 Kernel Subsystem allows exposure of sensitive system information to an unauthorized control sphere. An authorized attacker can disclose information locally.
Original NVD description (English source)
Exposure of sensitive system information to an unauthorized control sphere in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS