CVE-2026-69954

Analyzed Analyzed - Analysis Complete

Buffer Over-Read in Windows Overlay Filter

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

Buffer over-read in Windows Overlay Filter 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

2026-10-16

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-69954

EUVD

EUVD-2026-99114

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_server_2012	*
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-126	The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.

Attack-Flow Graph

Executive Summary

This is a buffer over-read vulnerability in the Windows Overlay Filter. It allows an authorized attacker with local access to read beyond the intended memory buffer, potentially exposing sensitive information stored in memory.

Detection Guidance

This vulnerability is a local information disclosure issue in the Windows Overlay Filter. Detection primarily involves checking for unusual system behavior or monitoring for buffer over-read events in Windows components. Use Windows Event Viewer to inspect system logs for errors related to overlay filters or memory access violations. Additionally, ensure all Windows systems are updated with the latest security patches from Microsoft to mitigate this risk.

Impact Analysis

An attacker could exploit this to access confidential data on your system, such as passwords or personal files, if they already have local access. This could lead to further attacks or data breaches.

Compliance Impact

This vulnerability allows local information disclosure through a buffer over-read in Windows Overlay Filter. For compliance with GDPR, it could lead to unauthorized access to personal data, violating Article 32 on security of processing. Under HIPAA, it may expose protected health information, potentially breaching the Security Rule requirements for safeguarding electronic protected health information.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows Overlay Filter vulnerability. Monitor Microsoft's update guide for specific patches and install them as soon as available.

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