CVE-2026-83870

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Out-of-bounds Read in Windows Aggregated Data Platform Service

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Microsoft Corporation

Description

Out-of-bounds read in Windows Aggregated Data Platform Service allows an authorized attacker to disclose information locally.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-13

Last Modified

2026-10-13

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-83870

EUVD

EUVD-2026-100027

Affected Vendors & Products

Vendor	Product	Version / Range
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

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-125	The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This vulnerability is an out-of-bounds read flaw in the Windows Aggregated Data Platform Service. It allows an authorized attacker with local access to read beyond the intended memory boundaries, potentially exposing sensitive information.

Detection Guidance

This vulnerability is an out-of-bounds read in the Windows Aggregated Data Platform Service. Detection typically requires monitoring for unusual data access patterns or crashes in the service. Check Windows Event Viewer for application crashes related to the service. Use PowerShell commands like Get-Service -Name 'Aggregated Data Platform Service' to verify if the service is running. Review system logs for any unauthorized local information disclosure events.

Impact Analysis

An attacker could exploit this to disclose confidential data stored on your system. Since it requires local access, physical or network-based access to the machine is necessary. The impact is limited to information exposure without altering system behavior.

Compliance Impact

This vulnerability could lead to unauthorized disclosure of personal or sensitive data, violating GDPR and HIPAA requirements for data protection. Organizations may face compliance penalties if exploited.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows Aggregated Data Platform Service. Monitor Microsoft's update guide for patches and install them promptly.

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