CVE-2026-83669

Analyzed Analyzed - Analysis Complete

Use of Uninitialized Resource in Windows Error Reporting Allows Privilege Escalation

Publication date: 2026-10-13

Last updated on: 2026-10-29

Assigner: Microsoft Corporation

Description

Use of uninitialized resource in Windows Error Reporting 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

2026-10-29

Generated

2026-11-08

AI Q&A

2026-10-14

EPSS Evaluated

2026-11-07

NVD

CVE-2026-83669

EUVD

EUVD-2026-99323

Affected Vendors & Products

Vendor	Product	Version / Range
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-908	The product uses or accesses a resource that has not been initialized.

Attack-Flow Graph

Executive Summary

This vulnerability involves the use of an uninitialized resource in Windows Error Reporting. An authorized attacker can exploit this to elevate their privileges locally on affected systems.

Detection Guidance

This vulnerability involves uninitialized resources in Windows Error Reporting. Detection typically requires reviewing system logs for unusual privilege escalation events or crashes in Windows Error Reporting components. Use Event Viewer to check for errors in 'Windows Logs > System' related to WerFault.exe or similar processes. No specific commands are provided in the available resources.

Impact Analysis

An attacker could gain higher-level access to your system, 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 allows local privilege escalation through Windows Error Reporting. While not directly impacting GDPR or HIPAA compliance, unauthorized privilege escalation could lead to unauthorized access to sensitive data, potentially violating confidentiality requirements in these regulations.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows Error Reporting component. Monitor Microsoft's update guide for the specific patch release for your Windows version.

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