CVE-2026-56184

Analyzed Analyzed - Analysis Complete

Information Disclosure in Windows Win32K

Publication date: 2026-07-14

Last updated on: 2026-07-22

Assigner: Microsoft Corporation

Description

Exposure of sensitive information to an unauthorized actor in Windows Win32K allows an authorized attacker to disclose information locally.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-14

Last Modified

2026-07-22

Generated

2026-08-04

AI Q&A

2026-07-15

EPSS Evaluated

2026-08-02

NVD

CVE-2026-56184

EUVD

EUVD-2026-44243

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2022	to 10.0.20348.5386 (exc)
microsoft	windows_server_2025	to 10.0.26100.33158 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7548 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7548 (exc)
microsoft	windows_11_24h2	to 10.0.26100.8875 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2525 (exc)
microsoft	windows_11_25h2	to 10.0.26200.8875 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-200	The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Attack-Flow Graph

Executive Summary

This vulnerability is an information disclosure issue in Windows Win32K where an authorized attacker can access sensitive information locally. It does not require user interaction but is limited to local access.

Detection Guidance

This vulnerability involves local information disclosure in Windows Win32K. Detection typically requires reviewing system logs for unusual access patterns or monitoring for unauthorized information exposure. No specific commands are provided in the available resources.

Impact Analysis

An attacker with local access could exploit this to read sensitive data on your system, potentially including passwords, personal files, or other confidential information.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, potentially violating GDPR or HIPAA requirements for data protection and confidentiality.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows Win32K vulnerability. Monitor Microsoft's security advisories for patches and install them promptly.

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