CVE-2026-50423

Analyzed Analyzed - Analysis Complete

Improper Access Control in Windows Kernel

Publication date: 2026-07-14

Last updated on: 2026-07-22

Assigner: Microsoft Corporation

Description

Improper access control in Windows Kernel allows an authorized attacker to elevate privileges 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-2026-50423

EUVD

EUVD-2026-43924

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_11_26h1	to 10.0.28000.2269 (exc)
microsoft	windows_server_2022	to 10.0.20348.5386 (exc)
microsoft	windows_server_2025	to 10.0.26100.33158 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2525 (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_25h2	to 10.0.26200.8875 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This vulnerability is an improper access control issue in the Windows Kernel. An authorized attacker can exploit it to elevate their privileges locally on a system.

Impact Analysis

An attacker with local access could gain higher privileges, allowing them to perform unauthorized actions such as installing programs, viewing or deleting data, or creating new accounts with full user rights.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, potentially violating compliance requirements like GDPR (data protection) or HIPAA (health information privacy) due to elevated privilege risks.

Mitigation Strategies

Apply the latest Windows security updates from Microsoft Update to patch the improper access control in the Windows Kernel. Monitor Microsoft's security advisories for patches and install them promptly.

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