CVE-2026-42908 Microsoft CVE debrief

Who should care

Administrators and users of Windows RDP should be aware of this vulnerability and take necessary precautions to prevent exploitation. This vulnerability can be used by attackers to disclose sensitive information over a network.

Technical summary

CVE-2026-42908 is an out-of-bounds read vulnerability in Windows RDP that allows unauthorized attackers to disclose information over a network. The vulnerability has a CVSS vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. It affects multiple versions of Windows, including Windows 10, Windows 11, and Windows Server. The vulnerability is classified as CWE-125.

Defensive priority

High

Recommended defensive actions

• Apply the latest security patches and updates for Windows RDP
• Implement network segmentation to limit the spread of the vulnerability
• Use secure communication protocols, such as encryption, to protect sensitive information
• Monitor network traffic for suspicious activity
• Implement access controls, such as authentication and authorization, to limit access to sensitive resources
• Regularly review and update security configurations to ensure they are current and effective

Evidence notes

The information provided is based on the CVE record and NVD detail [cve-org] [nvd]. The vulnerability affects multiple versions of Windows, including Windows 10, Windows 11, and Windows Server [source-item].

Official resources