EUVD-2026-73743
GHSA-h52g-xpf3-3p4p
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Network-reachable DNS service, no auth needed, but UAF exploitation requires precise heap grooming (AC:H); full RCE yields C:H/I:H/A:H.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Use after free in Windows DNS allows an unauthorized attacker to execute code over a network.
AnalysisAI
Remote code execution in Windows DNS Server exposes unauthenticated network attackers to full system compromise via a use-after-free memory corruption flaw. The vulnerability spans an exceptionally wide range of Windows Server releases - from the end-of-life Server 2012 through the current Server 2025 - making it an unusually broad-surface patch event. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The Windows DNS Server service must be running and reachable over UDP or TCP port 53 from the attacker. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.1 with vector AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H correctly reflects both the severity of full compromise and the non-trivial exploitation path. … 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 for each affected OS version as published in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72987. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: conduct asset inventory to identify all Windows DNS servers (Server 2012, 2012 R2, 2016, 2019, 2022, 2025) and assess network exposure (internet-facing, DMZ, or internal network access). …
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Same weakness CWE-416 – Use After Free
View allSame technique Use After Free
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External POC / Exploit Code
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