CVE-2026-100217

Analyzed Analyzed - Analysis Complete

Improper Privilege Management in Windows Group Policy

Publication date: 2026-10-13

Last updated on: 2026-10-20

Assigner: Microsoft Corporation

Description

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

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-13

Last Modified

2026-10-20

Generated

2026-11-08

AI Q&A

2026-10-14

EPSS Evaluated

2026-11-07

NVD

CVE-2026-100217

EUVD

EUVD-2026-100330

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
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_2025	to 10.0.26100.33650 (exc)
microsoft	windows_server_2022	to 10.0.20348.5761 (exc)
microsoft	windows_server_2016	to 10.0.14393.9612 (exc)
microsoft	windows_server_2019	to 10.0.17763.9376 (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-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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