Summary
Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. Customer action: Required.
Details
How could an attacker exploit this vulnerability?
An authenticated attacker could exploit this vulnerability by connecting to a target system via Remote Desktop Protocol (RDP) and sending specially crafted requests that trigger a use-after-free condition in the Remote Desktop service, allowing the attacker to execute arbitrary code on the target system.
According to the CVSS metric, privileges required is low (PR:L). What does that mean for this vulnerability?
An attacker must first have access to a Windows system as an authenticated user and then use that system to establish a connection to the target server and send the malicious data that triggers the vulnerability.
Security updates
10.0.20348.5386 — https://support.microsoft.com/help/5099540
10.0.19044.7548 — https://support.microsoft.com/help/5099539
10.0.26100.33158 — https://support.microsoft.com/help/5099536
10.0.26200.8875 — https://support.microsoft.com/help/5101650
10.0.28000.2525 — https://support.microsoft.com/help/5101649
Vulnerabilities 1
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High 8.8
Windows Remote Desktop Services Remote Code Execution Vulnerability
Use after free in Windows Remote Desktop Services allows an authorized attacker to execute code over a network.
Revision history
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#1
Information published.
References
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CVE-2026-58626 Windows Remote Desktop Services Remote Code Execution Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58626
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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