Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network-reachable DNS service but requires elevated DNS privileges (PR:H) and winning a use-after-free race (AC:H); scope change and full C/I/A impact reflect code execution in a system service.
Primary rating from Vendor (microsoft).
CVSS VectorNVD
Lifecycle Timeline
5DescriptionNVD
Use after free in DNS Server allows an authorized attacker to execute code over a network.
AnalysisAI
Remote code execution in the Microsoft Windows Server 2025 DNS Server role allows an authenticated network attacker to run arbitrary code by triggering a use-after-free memory-corruption condition (CWE-416). Both the full and Server Core installations of build 10.0.26100 prior to 10.0.26100.33158 are affected, with total impact to confidentiality, integrity and availability. There is no public exploit identified at time of analysis, and CISA SSVC currently rates exploitation as 'none'; EPSS is modest at 0.50% (39th percentile).
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Same weakness CWE-416 – Use After Free
View allSame technique Denial Of Service
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-43981
GHSA-3f5f-3xp4-rx44