HIGH Published October 13, 2026

CVE-2026-83665

Null pointer dereference in Windows DHCP Server allows an unauthorized attacker to deny service over a network.

CVSS base score

7.5 (v3.1)

Severity

HIGH

Attack vector

Network

Weakness

CWE-476

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 10 1809 microsoft windows server 2012 microsoft windows server 2016 microsoft windows server 2019 microsoft windows server 2022 microsoft windows server 2025

References

msrc.microsoft.com Patch, Vendor Advisory

View full NVD advisory →

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CVE-2026-83665

Affected products

References

More microsoft vulnerabilities

Published the same day

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