Login Request a demo
Medium severity · published Oct 13, 2026
CVE-2026-83909
Windows Win32 Kernel Subsystem Information Disclosure Vulnerability
4.7
CVSS
0.4%
EPSS
No
On KEV
Description
Exposure of sensitive system information to an unauthorized control sphere in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
W1
Windows 10 Version 1607 · Microsoft
10.0.14393.0 before 10.0.14393.9612 · source: vendor
W1
Windows 10 Version 1809 · Microsoft
10.0.17763.0 before 10.0.17763.9376 · source: vendor
W1
Windows 10 Version 21H2 · Microsoft
10.0.19044.0 before 10.0.19044.7807 · source: vendor
W1
Windows 10 Version 22H2 · Microsoft
10.0.19045.0 before 10.0.19045.7807 · source: vendor
W1
Windows 11 Version 24H2 · Microsoft
10.0.26100.0 before 10.0.26100.9711 · source: vendor
W1
Windows 11 Version 25H2 · Microsoft
10.0.26200.0 before 10.0.26200.9711 · source: vendor
W1
Windows 11 Version 26H2 · Microsoft
10.0.26300.0 before 10.0.26300.9711 · source: vendor
W1
Windows 11 version 23H2 · Microsoft
10.0.22631.0 before 10.0.22631.7652; 10.0.22631.0 before 10.0.22631.7652 · source: vendor
W1
Windows 11 version 26H1 · Microsoft
10.0.28000.0 before 10.0.28000.3231 · source: vendor
WS
Windows Server 2012 · Microsoft
6.2.9200.0 before 6.2.9200.26434 · source: vendor
WS
Windows Server 2012 (Server Core installation) · Microsoft
6.2.9200.0 before 6.2.9200.26434 · source: vendor
WS
Windows Server 2012 R2 · Microsoft
6.3.9600.0 before 6.3.9600.23470 · source: vendor
Affected product
W1
Windows 10 Version 1607
Microsoft
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-83909
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-83909
vendor-advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83909
More from Windows 10 Version 1607
9.8
CVE-2026-33824
Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability
8.8
CVE-2026-96951
Windows Shell Security Feature Bypass Vulnerability
8.8
CVE-2026-21510
Windows Shell Security Feature Bypass Vulnerability
8.8
CVE-2026-21513
MSHTML Framework Security Feature Bypass Vulnerability
8.8
CVE-2025-33073
Windows SMB Client Elevation of Privilege Vulnerability