Race condition in Windows and Windows Server - CVE-2026-54999
Published: July 15, 2026
Vulnerability identifier: #VU137582
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-54999
CWE-ID: CWE-362
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Windows
Windows Server
Windows
Windows Server
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a race condition in Windows TCP/IP. A remote attacker on the local network can exploit the race and execute arbitrary code on the system.
How to mitigate CVE-2026-54999
Install updates from vendor's website.