CVE-2026-54126

Analyzed Analyzed - Analysis Complete

Out-of-bounds Read in Windows RDP

Publication date: 2026-07-14

Last updated on: 2026-07-22

Assigner: Microsoft Corporation

Description

Out-of-bounds read in Windows RDP allows an unauthorized attacker to disclose information over a network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-14

Last Modified

2026-07-22

Generated

2026-08-04

AI Q&A

2026-07-15

EPSS Evaluated

2026-08-02

NVD

CVE-2026-54126

EUVD

EUVD-2026-44150

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	*
microsoft	windows_11_26h1	to 10.0.28000.2269 (exc)
microsoft	windows_10_1607	to 10.0.14393.9339 (exc)
microsoft	windows_10_1607	to 10.0.14393.9339 (exc)
microsoft	windows_10_1809	to 10.0.17763.9020 (exc)
microsoft	windows_10_1809	to 10.0.17763.9020 (exc)
microsoft	windows_server_2016	to 10.0.14393.9339 (exc)
microsoft	windows_server_2019	to 10.0.17763.9020 (exc)
microsoft	windows_server_2022	to 10.0.20348.5386 (exc)
microsoft	windows_server_2025	to 10.0.26100.33158 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2525 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7548 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7548 (exc)
microsoft	windows_11_24h2	to 10.0.26100.8875 (exc)
microsoft	windows_11_25h2	to 10.0.26200.8875 (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.

Attack-Flow Graph

Executive Summary

This is an out-of-bounds read vulnerability in Windows Remote Desktop Protocol (RDP). It allows an unauthorized attacker to read memory outside the intended buffer, potentially exposing sensitive information transmitted over the network.

Detection Guidance

Detection typically involves monitoring for unusual network traffic patterns or RDP service anomalies. Check Windows Event Viewer for RDP-related errors or crashes. Use network scanners to inspect RDP connections for unexpected data exposure. Ensure RDP is updated to the latest patch version.

Impact Analysis

An attacker could exploit this to access confidential data, such as credentials or sensitive files, if they can send crafted input to the RDP service. This may lead to further attacks like unauthorized access or data theft.

Compliance Impact

This vulnerability could result in unauthorized data disclosure, violating GDPR's data protection requirements or HIPAA's safeguards for protected health information. Organizations may face compliance penalties if exploited.

Mitigation Strategies

Apply the latest security updates from Microsoft for Windows RDP to patch the out-of-bounds read vulnerability. Monitor Microsoft's advisory for updates and disable RDP if not required.

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