CVE-2026-83677 Windows DHCP Client - Denial of Service

Windows DHCP Client contains a denial of service caused by missing release of memory after effective lifetime, letting unauthorized attackers cause network service disruption, exploit requires network access.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.87% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
13 October 2026
Updated
15 October 2026
Weakness
CWE-401

Vendor fix

Update to the latest Windows version with DHCP Client fixes.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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