CVE-2026-100217

Undergoing Analysis Undergoing Analysis - In Progress

Improper Privilege Management in Windows Group Policy

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

Improper privilege management in Windows Group Policy allows an authorized attacker to elevate privileges locally.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-10-13

Last Modified

2026-10-16

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-100217

EUVD

EUVD-2026-100330

Affected Vendors & Products

Vendor	Product	Version / Range
Microsoft	Windows	10 Version 1607 10.0.14393.0
Microsoft	Windows	10 Version 1809 10.0.17763.0
Microsoft	Windows	10 Version 21H2 10.0.19044.0
Microsoft	Windows	10 Version 22H2 10.0.19045.0
Microsoft	Windows	11 version 23H2 10.0.22631.0
Microsoft	Windows	11 Version 23H2 10.0.22631.0
Microsoft	Windows	11 Version 24H2 10.0.26100.0
Microsoft	Windows	11 Version 25H2 10.0.26200.0
Microsoft	Windows	11 version 26H1 10.0.28000.0
Microsoft	Windows	11 Version 26H2 10.0.26300.0
Microsoft	Windows	Server 2012 R2 6.3.9600.0
Microsoft	Windows	Server 2012 R2 (Server Core installation) 6.3.9600.0
Microsoft	Windows	Server 2016 10.0.14393.0
Microsoft	Windows	Server 2016 (Server Core installation) 10.0.14393.0
Microsoft	Windows	Server 2019 10.0.17763.0
Microsoft	Windows	Server 2019 (Server Core installation) 10.0.17763.0
Microsoft	Windows	Server 2022 10.0.20348.0
Microsoft	Windows	Server 2025 10.0.26100.0
Microsoft	Windows	Server 2025 (Server Core installation) 10.0.26100.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-862	The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

Executive Summary

This vulnerability is an improper privilege management issue in Windows Group Policy. An authorized attacker can exploit it to elevate their privileges locally on affected systems.

Detection Guidance

I don't know

Monitor Group Policy processing logs for unusual privilege changes or unauthorized modifications. Check Event ID 1096 in Windows Event Viewer for Group Policy errors.

Impact Analysis

An attacker could gain higher-level access to your system, allowing them to install programs, view or delete data, or create new accounts with full user rights. This could lead to system compromise or data breaches.

Compliance Impact

This vulnerability allows local privilege escalation, which could enable unauthorized access to sensitive systems or data. For GDPR, this may lead to unauthorized processing or access to personal data, violating principles of data protection and security. For HIPAA, it could compromise protected health information by allowing unauthorized users to gain elevated access to systems handling such data.

Mitigation Strategies

Apply the latest Windows security updates from Microsoft Update. Restrict local administrator privileges to prevent unauthorized privilege escalation. Review and audit Group Policy settings for suspicious modifications.

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