CVE-2026-42909

high Microsoft
CVSS v3 Base Score
7.5
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score
0.4%
Exploitation probability in 30 days
Top 68% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Published: June 9, 2026 (30 days ago)
Last Modified: July 9, 2026
Vendor: Microsoft
Source: NVD

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

CWE

CWE-362

Affected Products

microsoft remote desktop clientmicrosoft windows appmicrosoft windows 10 1607microsoft windows 10 1809microsoft windows 10 21h2microsoft windows 10 22h2microsoft windows 11 23h2microsoft windows 11 24h2microsoft windows 11 25h2microsoft windows 11 26h1

References

🔗 msrc.microsoft.com