CVE-2026-62817

HighCVSS 8.8/10Last modified Sep 2, 2026

Description

Out-of-bounds write in Windows DNS allows an unauthorized attacker to execute code over an adjacent network.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-787

Affected software

Vendor	Product	Versions
Microsoft	Windows Server 2019	>= 10.0.17763.0, < 10.0.17763.9121
Microsoft	Windows Server 2019 (Server Core installation)	>= 10.0.17763.0, < 10.0.17763.9121
Microsoft	Windows Server 2022	>= 10.0.20348.0, < 10.0.20348.5499
Microsoft	Windows Server 2025	>= 10.0.26100.0, < 10.0.26100.33296
Microsoft	Windows Server 2025 (Server Core installation)	>= 10.0.26100.0, < 10.0.26100.33296

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62817Patch, Vendor Advisory

Timeline

Published: Aug 11, 2026
Last modified: Sep 2, 2026
NVD status: Analyzed

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