Incorrect Authorization in Windows Win32K Elevates Privileges

Publication date: 2026-09-08

Last updated on: 2026-09-24

Assigner: Microsoft Corporation

Description

Incorrect authorization in Windows Win32K allows an authorized attacker to elevate privileges locally.

CVSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-24

Generated

2026-09-29

AI Q&A

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-70283

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows	-

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-863	The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Attack-Flow Graph

Executive Summary

This vulnerability is an elevation of privilege issue in Windows Win32K due to incorrect authorization. An authorized attacker can exploit it to gain higher privileges on a local system.

Impact Analysis

An attacker with local access could exploit this to gain elevated privileges, potentially allowing them to install programs, view or delete data, or create new accounts with full user rights.

Mitigation Strategies

Apply the latest Windows security updates from Microsoft to patch the Win32K authorization flaw. Monitor Microsoft's security advisories for updates and ensure all systems are updated promptly.

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