EUVD-2026-73338
GHSA-f9rr-pf3r-2rqr
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
DHCP is unauthenticated by protocol design; network reachability on UDP/67 suffices for exploitation with no complexity or interaction required.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
5DescriptionCVE.org
Missing release of memory after effective lifetime in Windows DHCP Server allows an unauthorized attacker to deny service over a network.
AnalysisAI
Unauthenticated remote denial-of-service in Windows DHCP Server (CWE-401) allows a network attacker to exhaust server memory without credentials, crashing or degrading the DHCP service across a broad range of Microsoft server OS versions from Server 2012 through Server 2025. Confirmed by Microsoft (secure@microsoft.com) and published via ENISA EUVD-2026-73338, the zero-complexity CVSS vector (AV:N/AC:L/PR:N/UI:N/A:H) means exploitation requires only the ability to reach UDP/67 on the target. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The Windows DHCP Server role must be installed and active on the target host. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) accurately reflects a high-severity, remotely exploitable DoS. … 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 Microsoft's vendor-released patch via Windows Update or WSUS, targeting the following minimum fixed build versions: Windows Server 2025 → 10.0.26100.33438, Windows Server 2022 → 10.0.20348.5622, Windows Server 2019 → 10.0.17763.9245, Windows Server 2016 → 10.0.14393.9512, Windows Server 2012 R2 → 6.3.9600.23397, Windows Server 2012 → 6.2.9200.26349. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an inventory of all Windows DHCP Server deployments (Server 2012 through Server 2025 editions) and verify network access controls restricting UDP/67 to trusted subnets only. …
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Same weakness CWE-401 – Memory Leak
View allSame technique Denial Of Service
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External POC / Exploit Code
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