HIGH Published October 13, 2026

CVE-2026-83677

Missing release of memory after effective lifetime in Windows DHCP Client allows an unauthorized attacker to deny service over a network.

CVSS base score

7.5 (v3.1)

Severity

HIGH

Attack vector

Network

Weakness

CWE-401

Last modified

October 29, 2026

CVSS vector

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

Affected products

microsoft windows 11 24h2 microsoft windows 11 25h2 microsoft windows 11 26h1 microsoft windows 11 26h2 microsoft windows server 2025

View full NVD advisory →

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