CVE-2026-61921

Analyzed Analyzed - Analysis Complete

Out-of-Bounds Read in Remote Desktop Client

Publication date: 2026-08-11

Last updated on: 2026-08-16

Assigner: Microsoft Corporation

Description

Out-of-bounds read in Remote Desktop Client allows an unauthorized attacker to disclose information over a network.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-11

Last Modified

2026-08-16

Generated

2026-09-01

AI Q&A

2026-08-11

EPSS Evaluated

2026-08-30

NVD

CVE-2026-61921

EUVD

EUVD-2026-56625

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_server_2012	*
microsoft	windows_10_1607	to 10.0.14393.9418 (exc)
microsoft	windows_10_1607	to 10.0.14393.9418 (exc)
microsoft	windows_10_1809	to 10.0.17763.9115 (exc)
microsoft	windows_10_1809	to 10.0.17763.9115 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7663 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7663 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7663 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7663 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7663 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7663 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7517 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7517 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9106 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9106 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2704 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2704 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9106 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9106 (exc)
microsoft	windows_server_2016	to 10.0.14393.9418 (exc)
microsoft	windows_server_2019	to 10.0.17763.9115 (exc)
microsoft	windows_server_2022	to 10.0.20348.5440 (exc)
microsoft	windows_server_2025	to 10.0.26100.33222 (exc)

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.
CWE-200	The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Attack-Flow Graph

Executive Summary

This vulnerability is an out-of-bounds read flaw in the Remote Desktop Client. It allows an unauthorized attacker to read memory outside the intended buffer, potentially exposing sensitive information transmitted over a network.

Detection Guidance

This vulnerability is an out-of-bounds read in the Remote Desktop Client. Detection typically requires monitoring for unusual network traffic or crashes in the Remote Desktop application. Check for updated patches from Microsoft and inspect system logs for Remote Desktop-related errors.

Impact Analysis

An attacker could exploit this to access confidential data, such as credentials or sensitive files, if they are transmitted during a Remote Desktop session. This could lead to further attacks like unauthorized access or data theft.

Compliance Impact

This vulnerability could result in unauthorized disclosure of personal or health data, violating GDPR or HIPAA requirements. Organizations may face compliance penalties if such breaches occur due to unpatched systems.

Mitigation Strategies

Apply the latest security updates from Microsoft for the Remote Desktop Client to patch the out-of-bounds read vulnerability. Monitor Microsoft's update guide for patches and install them promptly.

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