Remote Desktop Client Remote Code Execution Vulnerability
CVE-2026-42909

7.5HIGH

Key Information:

Vendor

Microsoft
Status
Remote Desktop Client For Windows Desktop
Windows 10 Version 1607
Windows 10 Version 1809
Windows 10 Version 21h2
Vendor
CVE Published:
9 June 2026

What is CVE-2026-42909?

Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

Affected Version(s)

Remote Desktop client for Windows Desktop 1.2.0.0 < 1.2.7214.0

Windows 10 Version 1607 32-bit Systems 10.0.14393.0 < 10.0.14393.9234

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.8880

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.