CVE-2026-77886 Windows DHCP Server - Denial of Service

Windows DHCP Server contains an out-of-bounds read vulnerability allowing unauthorized attackers to cause denial of service over a network, exploit requires network access.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
1.17% 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
8 September 2026
Updated
15 October 2026
Weakness
CWE-125

Vendor fix

Update to the latest version of Windows DHCP Server.

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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