CVE-2026-83909CWE-497

CVE-2026-83909

Medium · published October 13, 2026

CVSS v3.1
4.7
EPSS
0%
Percentile
30.5
In the wild
Unconfirmed
What it is

Exposure of sensitive system information to an unauthorized control sphere in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.

The record
Technical detail
CVSS v3.1
4.7 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00377 · 30.5th percentile
Weakness
CWE-497 · Exposure of Sensitive System Information to an Unauthorized Control Sphere
Published
2026-10-13T23:20Z
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83909 · [email protected]
EPSS history
Timeline
  • 15 OCT 03:34Z
    EPSS moved — → 0%
    epss
  • 13 OCT 18:59Z
    Windows Win32 Kernel Subsystem Information Disclosure Vulnerability
    cvelistv5
  • 13 OCT 18:59Z
    Windows Win32 Kernel Subsystem Information Disclosure Vulnerability
    cvelistv5