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Windows DNS CVE-2026-61920

| EUVDEUVD-2026-56622 MEDIUM
Race Condition (CWE-362)
2026-08-11 secure@microsoft.com GHSA-q7cm-j53p-gvff
Information Disclosure Race Condition Microsoft Windows 10 1607 Windows 10 1809 Windows 11 26h1 Windows Server 2012 Windows Server 2016 Windows Server 2019 Windows Server 2022 Windows Server 2025
6.6
CVSS 3.1 · Vendor: microsoft
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Severity by source

Vendor (microsoft) PRIMARY
6.6 MEDIUM
AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
6.6 MEDIUM

Network vector confirmed by DNS service exposure; AC:H for race condition timing requirement; PR:H because exploitation requires authorized high-privilege access per description.

3.1 AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Analysis Generated
Aug 11, 2026 - 23:10 vuln.today
Patch available
Aug 11, 2026 - 18:19 EUVD
CVE Published
Aug 11, 2026 - 17:18 cve.org
MEDIUM 6.6

DescriptionCVE.org

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows DNS allows an authorized attacker to execute code over a network.

AnalysisAI

Remote code execution via race condition in Windows DNS affects authorized, high-privileged attackers across a broad range of Windows Server and Windows client versions. The CWE-362 race condition allows an attacker who already holds elevated credentials to exploit concurrent shared-resource access in the DNS service, achieving full code execution (C:H/I:H/A:H) over the network. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Vulnerability AssessmentAI

Exploitation Exploitation requires the attacker to be an authorized user with high-privilege access to the target Windows system running the DNS role - CVSS PR:H confirms authentication at an elevated level is mandatory. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS base score of 6.6 accurately reflects the tension between high CIA impact and the significant exploitation barriers (AC:H, PR:H). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation The primary remediation is to apply the vendor-released patches via Windows Update or WSUS, targeting the fixed build numbers per affected release: Windows Server 2025 to 10.0.26100.33296 or later; Windows Server 2022 to 10.0.20348.5499 or later; Windows Server 2019 to 10.0.17763.9115 or later; Windows Server 2016 to 10.0.14393.9418 or later; Windows Server 2012 R2 to 6.3.9600.23337 or later; Windows 10 1607/1809 and Windows 11 26H1 to their respective fixed builds. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-61920 vulnerability details – vuln.today
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