Main Vulnerability Database Vulnerabilities #VU141499

Race condition in Microsoft Windows and Windows Server - CVE-2026-66802

Published: August 11, 2026

Vulnerability identifier: #VU141499

CSH Severity: High

CVSS v4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-66802

CWE-ID: CWE-362

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the system.

The vulnerability exists due to a race condition in Windows Device Health Attestation (DHA). A remote attacker can exploit the race and execute arbitrary code on the system.

Affected software

Microsoft Windows
Windows Server

How to mitigate CVE-2026-66802

Install updates from vendor's website.

Microsoft Windows - addressed in versions 10 1809 10.0.17763.9115, 11 26H1 10.0.28000.2704
Windows Server - addressed in versions 2019 10.0.17763.9115, 2022 10.0.20348.5440, 2022 10.0.20348.5499, 2025 10.0.26100.33222, 2025 10.0.26100.33296

External References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66802

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