CVE-2026-54990: Remote Desktop Client Remote Code Execution Vulnerability
Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
Other sources
Remote Desktop Client Remote Code Execution Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.8875Patch KB5101650 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.8875Patch KB5101650 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33158Patch KB5099536 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.2525Patch KB5101649
Event History
Frequently Asked Questions
What is the severity of CVE-2026-54990?
CVE-2026-54990 has a critical severity rating of 9.8.
What is CVE-2026-54990?
CVE-2026-54990 is a remote code execution vulnerability in the Remote Desktop Client due to a heap-based buffer overflow.
How do I fix CVE-2026-54990?
To fix CVE-2026-54990, ensure your Remote Desktop Client and associated software are updated with the latest security patches from Microsoft.
Which systems are affected by CVE-2026-54990?
CVE-2026-54990 affects Microsoft Windows 11 and Microsoft Windows Server 2025.
What can an attacker do with CVE-2026-54990?
An attacker exploiting CVE-2026-54990 can execute arbitrary code on the affected system over a network.