EUVD-2026-73171
GHSA-jgx6-mwwf-vp8q
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Network-accessible DNS with no auth required (AV:N/PR:N), but race condition timing required (AC:H); impact is pure availability loss with no confidentiality or integrity effect.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows DNS allows an unauthorized attacker to deny service over a network.
AnalysisAI
Denial-of-service in Windows DNS Server allows unauthenticated network attackers to crash or hang the DNS service via a race condition in concurrent request handling. The vulnerability spans a broad range of Windows Server versions from Server 2012 through Server 2025, making it relevant across many enterprise environments. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The Windows DNS Server role must be installed and active on the target system - this is not enabled by default on all Windows Server deployments and is never present on standard workstation configurations. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is moderate despite the 5.9 CVSS base score. … 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 | Apply the Microsoft-released security update for the applicable Windows Server version via Windows Update or WSUS. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-362 – Race Condition
View allSame technique Race Condition
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External POC / Exploit Code
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