EUVD-2026-73266
GHSA-5m6x-v5vj-c5mr
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
DHCP is network-accessible with no auth requirement; impact is availability-only crash with no confidentiality or integrity loss.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Access of resource using incompatible type ('type confusion') in Windows DHCP Server allows an unauthorized attacker to deny service over a network.
AnalysisAI
Type confusion (CWE-843) in the Windows DHCP Server service allows unauthenticated remote attackers to crash the service, causing a denial of service across affected Windows Server deployments. The flaw spans a wide range of Windows Server versions from 2012 through 2025, as well as Windows 10 builds 1607 and 1809 that run the DHCP Server role. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The DHCP Server role must be installed and running on the affected Windows Server or Windows 10 host - the vulnerability does not affect standard client-mode Windows installations. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS vector (AV:N/AC:L/PR:N/UI:N) reflects the realistic exploitation path well: DHCP servers are network-exposed by design and the protocol requires no authentication, making this trivially reachable by any host on the same network segment or routed network if UDP port 67 is reachable. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the Microsoft patch released for each affected version: update Windows Server 2025 to build 10.0.26100.33438 or later; Windows Server 2022 to 10.0.20348.5622 or later; Windows Server 2019 and Windows 10 1809 to 10.0.17763.9245 or later; Windows Server 2016 and Windows 10 1607 to 10.0.14393.9512 or later; Windows Server 2012 R2 to 6.3.9600.23397 or later; and Windows Server 2012 to 6.2.9200.26349 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct a network inventory identifying all Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025 instances running the DHCP Server role, plus any Windows 10 builds 1607 and 1809 systems with DHCP enabled, to quantify organizational exposure. …
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External POC / Exploit Code
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