Remote Desktop Client Remote Code Execution Vulnerability
CVE-2026-42993

7.5HIGH

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 21h2
Windows 10 Version 22h2
Windows 11 Version 23h2
Windows 11 Version 23h2
Vendor
CVE Published:
9 June 2026

What is CVE-2026-42993?

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

Affected Version(s)

Windows 10 Version 21H2 32-bit Systems 10.0.19044.0 < 10.0.19044.7417

Windows 10 Version 22H2 32-bit Systems 10.0.19045.0 < 10.0.19045.7417

Windows 11 version 23H2 ARM64-based Systems 10.0.22631.0 < 10.0.22631.7219

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

.