Race condition in Microsoft Windows and Windows Server - CVE-2026-62820

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Main Vulnerability Database Vulnerabilities #VU141548

Race condition in Microsoft Windows and Windows Server - CVE-2026-62820

Published: August 12, 2026


Vulnerability identifier: #VU141548
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-2026-62820
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 DNS Server. A remote attacker can exploit the race and execute arbitrary code on the target system.


Affected software

Microsoft Windows
Windows Server

How to mitigate CVE-2026-62820

Install updates from vendor's website.

Microsoft Windows - addressed in versions 10 1607 10.0.14393.9418, 10 1809 10.0.17763.9115
Windows Server - addressed in versions 2016 10.0.14393.9418, 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

Related Security Bulletins