Summary
Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
How could an attacker exploit this vulnerability?
An attacker could host a malicious server and convince a user to connect to it from an affected client. When the client processes the server's response, the attacker could execute code on the client system. User interaction is required.
Security updates
1.2.7279.0 — https://docs.microsoft.com/en-us/windows-server/remote/remote-desktop-services/clients/windowsdesktop-whatsnew
Vulnerabilities 1
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High 8.8
Remote Desktop Client Remote Code Execution Vulnerability
Improper control of generation of code ('code injection') in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
Revision history
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#1
Information published.
References
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CVE-2026-78463 Remote Desktop Client Remote Code Execution Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78463
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss