EUVD-2026-73342
GHSA-f942-8v39-3h7r
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Network-accessible DNS service, no auth required (PR:N), but race condition demands precise timing (AC:H); successful exploit yields full system compromise (C:H/I:H/A:H).
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
5DescriptionCVE.org
Concurrent execution using shared resource with improper synchronization ('race condition') in DNS Server allows an unauthorized attacker to execute code over a network.
AnalysisAI
Remote code execution in Windows DNS Server affects multiple Windows Server versions through a race condition on a shared resource during concurrent request processing. An unauthenticated network attacker can exploit the timing window to corrupt state and execute arbitrary code on the DNS Server host. …
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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 running on the target host - this is not a default Windows installation but is extremely common in Active Directory-joined environments. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.1 score (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H) captures the core tension: all three impact components are High - a successful exploit means full system compromise - but AC:H reflects the inherent difficulty of reliably winning a race condition over a network. … 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 security update resolving CVE-2026-69827, available via Windows Update, WSUS, or the Microsoft Update Catalog. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct a complete asset inventory of all Windows DNS Server instances across the infrastructure and determine patch applicability for each server version. …
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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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