CVE-2026-83897

Analyzed Analyzed - Analysis Complete

Exposure of Sensitive Information in Windows Win32 Kernel Subsystem

Publication date: 2026-10-13

Last updated on: 2026-10-21

Assigner: Microsoft Corporation

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 Scores

EPSS Scores

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Meta Information

Published

2026-10-13

Last Modified

2026-10-21

Generated

2026-11-08

AI Q&A

2026-10-13

EPSS Evaluated

2026-11-07

NVD

CVE-2026-83897

EUVD

EUVD-2026-100032

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_server_2012	*
microsoft	windows_server_2022	to 10.0.20348.5761 (exc)
microsoft	windows_10_1607	to 10.0.14393.9612 (exc)
microsoft	windows_10_1607	to 10.0.14393.9612 (exc)
microsoft	windows_10_1809	to 10.0.17763.9376 (exc)
microsoft	windows_10_1809	to 10.0.17763.9376 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7652 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7652 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9711 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9711 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9711 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9711 (exc)
microsoft	windows_11_26h1	to 10.0.28000.3231 (exc)
microsoft	windows_11_26h1	to 10.0.28000.3231 (exc)
microsoft	windows_11_26h2	to 10.0.26300.9711 (exc)
microsoft	windows_11_26h2	to 10.0.26300.9711 (exc)
microsoft	windows_server_2016	to 10.0.14393.9612 (exc)
microsoft	windows_server_2019	to 10.0.17763.9376 (exc)
microsoft	windows_server_2025	to 10.0.26100.33650 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-497	The product does not properly prevent sensitive system-level information from being accessed by unauthorized actors who do not have the same level of access to the underlying system as the product does.

Attack-Flow Graph

Executive Summary

This vulnerability involves the exposure of sensitive system information in the Windows Win32 Kernel Subsystem. An authorized attacker could exploit it to disclose information locally, meaning they need some level of access to the system first.

Detection Guidance

This vulnerability involves local information disclosure in the Windows Win32 Kernel Subsystem. Detection typically requires monitoring for unusual system information exposure or kernel-level anomalies. Use Windows Event Viewer to check for suspicious kernel events or system logs. Microsoft Defender for Endpoint can also detect such behaviors. No specific commands are provided in the available resources.

Impact Analysis

An attacker could gain access to sensitive system details, which might help them plan further attacks. This could lead to unauthorized data access or system compromise if combined with other vulnerabilities.

Compliance Impact

This vulnerability allows local disclosure of sensitive system information, which could lead to unauthorized access to confidential data. For GDPR, this may violate principles of data confidentiality and security. For HIPAA, it could risk protected health information exposure if exploited on systems handling such data.

Mitigation Strategies

Apply the latest Windows security updates from Microsoft to patch the Win32 Kernel Subsystem vulnerability. Monitor Microsoft's security advisories for updates and ensure all affected systems are updated promptly.

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EPSS Chart

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