RDP files Archives

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July 20, 2026

July 2026 Patch Tuesday: KB5101650 Windows 11 Update

On July 14, 2026, Microsoft released cumulative update KB5101650 for Windows 11 versions 25H2 and 24H2, addressing OS Builds 26200.8875 and 26100.8875. This update includes essential security fixes, updates to Secure Boot certificates, and enhanced Remote Desktop Protocol (RDP) defenses against phishing attacks. It consolidates July 2026's security content, addressing known vulnerabilities and introducing functional improvements. The update is critical for minimizing exposure to identified threats and is prioritized for systems managing remote access or nearing certificate expiration. The update enhances Remote Desktop security by supporting SHA-2 certificate thumbprints while retaining SHA-1 for legacy compatibility. It includes new Group Policy options to mitigate phishing risks associated with malicious .rdp files. The curl upgrade to version 8.21.0 incorporates security patches for command-line tools in Windows environments. Secure Boot certificates are automatically updated through Windows updates, ensuring boot security across various hardware. KB5101650 installs primarily through the Windows Update interface, requiring a restart to activate changes. Enterprise environments can use the Microsoft Update Catalog for manual distribution. A temporary restriction affects certain Dell devices with Intel Innovation Platform Framework drivers, which Microsoft plans to address in a future update. The cumulative update resolves a total of 622 Microsoft CVEs, including 416 affecting Windows components. Users are advised to verify and install the update promptly to secure the full suite of improvements.

Winsage

May 1, 2026

Microsoft fixes Remote Desktop warnings displaying incorrectly

Microsoft resolved an issue affecting the display of security warnings when opening Remote Desktop (.rdp) files across all supported Windows versions, including Windows 11, Windows 10, and Windows Server. This problem was particularly evident on devices with multiple monitors having different display scaling settings. The fix was included in the optional KB5083631 preview cumulative update for Windows 11. The issue arose after the installation of the April 2026 security update, which introduced security warnings to enhance protection against phishing attacks. Users reported misalignment and obscured buttons in the security dialog, making it difficult to interact with. Additionally, the April security updates caused issues with third-party backup applications on Windows 11 systems and led to restart loops and failures during update installations on Windows Server.

Winsage

April 29, 2026

Windows 11 April Patches Trigger Remote Desktop Bug

Microsoft has acknowledged a significant issue with the April updates to Windows 11, particularly affecting the Remote Desktop feature in mixed-scaling multi-monitor environments. Security warning dialogs may become unreadable, complicating the trust prompt process before initiating a connection. Temporary workarounds have been provided while a permanent solution is being developed. The issue arises from a new warning window introduced in April, which is difficult to read or interact with when different display scaling settings are used. Affected Windows 11 packages include KB5083769 and KB5082052. Users are advised to align scaling values across monitors or use keyboard navigation if the mouse fails to interact with the buttons. Microsoft added this bug to its known issues documentation on April 23 and updated it on April 27, indicating ongoing investigation and a cumulative update is anticipated to restore prompt clarity. The April release cycle also faced a separate regression related to BitLocker recovery, adding operational strain on administrators.

Winsage

April 28, 2026

Microsoft: New Remote Desktop warnings may display incorrectly

Microsoft has identified an issue affecting the display of security warnings when users open Remote Desktop (.rdp) files across all supported versions of Windows, including Windows 11, Windows 10, and Windows Server. The security warning may not render correctly, making the text difficult to read and buttons misaligned, especially when multiple monitors with different display scaling settings are used. This issue often results in overlapping text or obscured buttons in the warning window. The problem is part of Microsoft's security enhancements introduced with the April 2026 cumulative updates, which aim to mitigate risks associated with malicious RDP connection files. Users receive a one-time educational prompt upon opening an RDP file for the first time, followed by a security dialog that provides information about the file's publisher and resource redirections. RDP files are commonly used in enterprise environments, but their exploitation in phishing campaigns has raised security concerns, particularly by groups like the Russian state-sponsored APT29.

Winsage

April 24, 2026

Microsoft beefs up Remote Desktop security with … hard-to-read messages

Microsoft has released an update to improve the security of its Remote Desktop feature, which includes a warning for users opening Remote Desktop (.rdp) files. However, this warning is not displaying correctly for some users due to a bug identified in the Known Issues list after the April 14 update. The issue primarily affects users with multiple monitors set to different display scaling, leading to overlapping text or obscured buttons. Microsoft has advised users to synchronize their display scaling settings or use keyboard navigation as a workaround. The company plans to address this issue in a future Windows update but is not issuing an Out-of-Band update specifically for it. Additionally, a serious vulnerability (CVE-2026-40372) was discovered in the .NET framework, affecting versions 10.0.0 to 10.0.6, which requires immediate attention. This vulnerability impacts all Windows versions that received the update, including Windows 11 26H1.

Winsage

April 15, 2026

Microsoft adds Windows protections for malicious Remote Desktop files

Microsoft has introduced new security measures for Windows 10 and Windows 11 to protect against phishing attacks that exploit Remote Desktop Protocol (RDP) connection files. These updates, part of the April 2026 cumulative updates (KB5082200, KB5083769, and KB5082052), include a one-time educational prompt for users upon first opening an RDP file, requiring acknowledgment of the associated risks. Subsequent attempts to open RDP files will display a security dialog with information about the file's publisher, the remote system address, and local resource redirections, with options disabled by default. If an RDP file is unsigned, a warning will indicate an "Unknown remote connection." These protections apply only to connections initiated through RDP files, not through the Windows Remote Desktop client, and can be temporarily disabled via the Windows Registry.